Editing Wheelbase, track width, and differential measurements

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==Introduction==
;{{Note1}}All measurements are in inches unless otherwise noted.

This article will be divided into at least three sections 

The first section will list wheelbase, front track and rear track of vehicles '''in inches''', so that those interested in frame swaps or clip swaps can find the correct donor vehicle. Dimensions will be listed left to right as wb/ft/rt followed by the year, make and model of the vehicle. For instance: 86.0, 50.6, 50.3 -- 1952 Morris Minor. If one or more of the dimensions are unknown, NA should be inserted in that space. For instance, if the wheelbase of the Morris were unknown, it would be listed as NA, 50.6, 50.3 -- 1952 Morris Minor. If the wheelbase were known, but the front and rear track were unknown, it would be listed as 86.0, NA, NA -- 1952 Morris Minor.
 
==Guide for taking measurements==

Most often, wheelbase is the dimension from the center point at the end of the front axle or spindle to the center point of the end of the rear axle.  Note that the measurement could also be described as being between the center points of the circles described by the front and rear wheels on the same side of the vehicle.  

Track is the dimension from the centerline of the tire tread on one tire to the centerline of the tire tread on the opposite tire on the same end of the vehicle. E.G.: Front track or rear track.  On vehicles with dual wheels, that measurement is commonly taken from halfway between the centers of each tire on both right and left sides.  There are also "Inner track" and "Outer track" dimensions, measured from the center lines of the inner tires and the outer tires of the dual wheel axle.

The second section will be listed as axle flange to axle flange where the wheel bolts on. Drum to drum would be close enough to the same if that's all the information you have to post. The only difference between the two would be the thickness of the material of the two drums or brake rotors/discs at the studs.

The third section will list backing plate to backing plate on the rear differential. This information will require knowing the width of the brake drum to determine flange to flange dimensions. Find brake drum width, multiply X two and add that figure to the plate to plate dimension to get flange to flange.

==Wheelbase, front track, rear track==

===American Motors===
*100.0, 61.2, 60.2 -- 1975 AMC Pacer

===GM car===
*122.0, 58.31,59.25 - 1937 Buick Special
*126.0, 58.31,59.25 - 1937 Buick Century
*N/A,,, 59.1, 58.8 -- 1968-'74 Buick Apollo
*112.0 coupe; 116.0 sedan,wagon; 61.5, 60.7 -- 1973-'77 Buick Regal
*111.0, 59.1, 59.7 -- 1975 Buick Skylark
*N/A,,, 59.0, 58.8 -- 1978-'86 Buick Century
*115, 56.69, 58.75 -- 1949-'54 Chevy & Canadian Pontiac
*115.0, 58.5, 60.0 -- 1955-'57 Chevy
*108.1, 58.7, 60.5 -- 1967-'69 Chevy Camaro (other source shows 108.1/59.0/58.9)
*108.1, 60.4, 61.0 -- 1970 Chevy Camaro
*108.1, 58.9, 59.5 -- 1970-'73 Chevy Camaro Z-28
*N/A,,, 61.3, 60.5 -- 1976-'80 Chevy Camaro Z-28, Pontiac Trans Am 
*101.1, 60.7, N/A, -- 1993-'02 Chevy Camaro
*101.0, 60.7, 60.6 -- 1986 Chevy Camaro IROC Z
*101.1, 60.7, 60.7 -- 1998 Chevy Camaro
*112.3, 63.7, 64.1 -- 1999 Chevy Camaro LS, LT
*112.3, 63.7, 63.7 -- 1999 Chevy Camaro SS
*119.0, 62.5, 62.4 -- 1965-'70 Chevy Caprice
*121.5, N/A,,, N/A -- 1971-'76 Chevy Caprice coupe/sedan
*125.0, N/A,, 64.5 -- 1971-'76 Chevy Caprice station wagon
*116.0, N/A,,, N/A -- 1977-'90 Chevy Caprice
*115.9, 61.8, 60.7 -- 1991-'96 Chevy Caprice
*112.0 coupe; 116.0 sedan,wagon, 61.5, 60.7 -- 1973-'77 Chevy Malibu, Laguna
*102.0, 57.0, 59.0 -- 1954-'62 Chevy Corvette
*N/A,,, 58.7, 59.5 -- 1968-'82 Chevy Corvette
*N/A,,, 59.6, 60.4 -- 1984-'95 Chevy Corvette
*108.0, 58.5, 58.8 -- 1978-'88 Chevy Monte Carlo, Malibu, El Camino (117.1 wheelbase), Olds Cutlass, Pontiac Grand Prix
*111.0, 59.8, 59.6 -- 1968-'74 Chevy Nova
*97.0, 54.7,, 53.6 -- 1971-'77 Chevy Vega, 1973-'77 Pontiac Astre, 1975-'80 Chevy Monza, Buick Skyhawk, Olds Starfire, 1976-'80 Pontiac Sunbird
*112.0 coupe; 116.0 sedan,wagon, 61.5, 60.7 -- 1973-'77 Oldsmobile Cutlass, 442
*112.0 coupe; 116.0 sedan,wagon, 61.5, 60.7 -- 1973-'77 Pontiac Grand Prix, LeMans
*N/A,,, 58.9, 59.0 -- 1978-'86 Pontiac Grand Prix
*115.0, N/A,,, N/A -- 1966 Pontiac GTO
*N/A,,, 59.9, 59.6 -- 1968-'74 Pontiac GTO
*112.25, 57.5, 59.0 -- 1939-'40 Chevy w/knee action shocks
*112.25, 56.375, 59 -- 1939 Chevy w/I-beam front end

*116.0, 57.6, 60.0 -- 1941-'48 Chevy

===GM truck===
*106.5, 64.5, 63.0 -- 1973-'91 Chevy Blazer 2WD
*106.5, 65.75, 62.75-- 1973-'91 Chevy Blazer 4WD
*131.5, 65.8, 62.7 -- 1973-'87 Chevy C-10, K-10
*131.5, 65.8, 62.7 -- 1973-'87 Chevy C-20, K-20, C30
*164.5, 65.8, 62.7 -- 1973-'91 Chevy C-30 Crew Cab
*129.5, 65.8, 62.7 -- 1973-'91 Chevy Suburban
*114.5, 60.52,61.02 -- 1955 Chevy 2nd. series (1955 1st. series was same as 1954)
*116.0, 59.5, 60,, -- 1947-'54 Chevy AD 1/2 ton
*125.25,N/A,,,,62,, -- 1947-'54 Chevy AD 3/4 ton
*137.0, N/A,,, N/A,, -- 1947-'54 Chevy AD 1 ton
*144.0, N/A,,, N/A,, -- 1902 Chevy Silverado 1500 4WD
*102.4, N/A,,, N/A,, -- 1972-'80 Chevy LUV w/standard cab and 73.1" box (unequal length A-arms with torsion bars was standard front suspension on LUV)
*104.3, N/A,,, 54",, -- 1981-'82 Chevy LUV w/standard cab and 73.1" box (unequal length A-arms with torsion bars was standard front suspension on LUV)
*117.9, N/A,,, 54",, -- 1978-'82 Chevy LUV w/standard cab and 90.1" box (unequal length A-arms with torsion bars was standard front suspension on LUV)
*100.5, 54.5, 54.7 -- 1983-'01 Chevy S-10 Blazer 2-dr., 1983-'01 GMC Jimmy 2-dr.
*107.0, 54.5, 54.7 -- 1990-'01 Chevy S-10 Blazer 4-dr., 1990-'01 GMC Jimmy 4-dr.
*108.3, 54.5, 54.7 -- 1982-'93 Chevy S-10 standard cab, 73" box, 1982-'93 GMC reg cab, 73" box (stock Malibu and El Camino spindles are bolt-on)
*117.9, 54.5, 54.7 -- 1982-'93 Chevy S-10 standard cab, 89" box, '82-'93 GMC regular cab, 89" box
*122.9, 54.5, 54.7 -- 1983-?  Chevy S-10 extended cab, '83-? GMC Sanoma extended cab
*135.0, 67.8, 67.8 -- 1908 Chevy Express Cargo 1500 work van
*111.2, n/a,  n/a, -- 1904 - '12 Chevy Colorado reg. cab
*126  , n/a,  n/a, -- 1904 - '12 Chevy Colorado ext. cab

===Ford car===
*108, N/A,,, N/A  -- 1964-'68 Mustang
*96.2, 55.6, 55.8 -- 1974-'79 Ford Mustang II, Ford Pinto, Mercury Bobcat, Mercury Capri (track also listed as 55.1/55.3)
*100.5, 56.6, 57.0 -- 1986 Ford Mustang GT

===Ford truck===
'''1953-'55'''
*F100 1/2-ton - 110"
*F250 3/4-ton - 118"
*F350 3/4-ton - 130" (F350 was still classified as 3/4 ton trucks through '55)

'''1956-'60'''
*F100 1/2-ton SWB - 110"
*F100 1/2-ton LWB - 118"
*F250 3/4-ton - 118"
*F350 1-ton - 130"

'''1961-'63'''
*F100 1/2-ton SWB - 114"
*F100 1/2-ton LWB - 122"
*F250 3/4-ton - 122"
*F350 1-ton - 132"

'''1964'''
*F100 1/2-ton SWB - 114"
*F100 1/2-ton LWB - 128"
*F250 3/4-ton - 128"
*F350 1-ton - 132"

'''1965-'66'''
*F100 1/2-ton SWB - 115"
*F100 1/2-ton LWB - 129"
*F250 3/4-ton - 129"
*F250 3/4-ton Crew Cab - 147"
*F350 1-ton - 132"
*F350 1-ton Crew Cab - 152"

'''1967-'68'''
*F100 1/2-ton SWB - 115"
*F100 1/2-ton LWB - 131"
*F250 3/4-ton - 131"
*F250 3/4-ton Crew Cab - 147"
*F350 1-ton - 132"
*F350 1-ton Crew Cab - 152"

'''1969-'70'''
*F100 1/2-ton SWB - 115"
*F100 1/2-ton LWB - 131"
*F250 3/4-ton - 131"
*F250 3/4-ton Crew Cab - 147"
*F350 1-ton - 135"
*F350 1-ton Crew Cab - 159.5"

'''1971'''
*F100 1/2-ton SWB - 115"
*F100 1/2-ton LWB - 131"
*F250 3/4-ton - 131"
*F250 3/4-ton Crew Cab - 159"
*F350 1-ton - 135"
*F350 1-ton Crew Cab - 159.5"

'''1972'''
*F100 1/2-ton SWB - 115"
*F100 1/2-ton LWB - 131"
*F250 3/4-ton - 131"
*F250 3/4-ton Crew Cab - 159"
*F350 1-ton - 135"
*F350 1-ton Crew Cab - 159"

'''1973'''
*F100 1/2-ton SWB - 117"
*F100 1/2-ton LWB - 133"
*F250 3/4-ton - 133"
*F250 3/4-ton Crew Cab - 161"
*F350 1-ton - 137"
*F350 1-ton Crew Cab - 165.5"

'''1974'''
*F100 1/2-ton SWB - 117"
*F100 1/2-ton LWB - 133"
*F100 1/2-ton SuperCab LWB 6-ft. bed - 140"
*F100 1/2-ton SuperCab LWB 8-ft. bed - 155"
*F250 3/4-ton - 133"
*F250 3/4-ton SuperCab - 140"
*F250 3/4-ton Crew Cab - 155"
*F350 1-ton - 137"
*F350 1-ton SuperCab - 140"
*F350 1-ton Platform/Stake - 161"
*F350 1-ton Crew Cab - 166.5"

'''1975'''
*F100 1/2-ton SWB - 117"
*F100 1/2-ton LWB - 133"
*F100 1/2-ton SuperCab 6-ft. bed - 140"
*F100 1/2-ton SuperCab 8-ft. bed - 155"
*F150 1/2-ton - 133"
*F250 3/4-ton - 133"
*F250 3/4-ton Crew Cab - 155"
*F350 1-ton - 137"
*F350 1-ton Platform/Stake - 161"
*F350 1-ton SuperCab - 155"
*F350 1-ton Crew Cab - 166.5"

'''1976'''
*F100 1/2-ton SWB - 117"
*F100 1/2-ton LWB - 133"
*F100 1/2-ton SuperCab - 155"
*F150 1/2-ton - 133"
*F250 3/4-ton - 133"
*F250 3/4-ton Crew Cab - 155"
*F350 1-ton - 137"
*F350 1-ton SuperCab - 155"
*F350 1-ton Crew Cab - 166.5"

'''1977'''
*F100 1/2-ton SWB - 117"
*F100 1/2-ton LWB - 133"
*F100 1/2-ton SuperCab - 155"
*F150 1/2-ton - 133"
*F150 SuperCab - 155"
*F250 3/4-ton - 133"
*F250 3/4-ton Crew Cab - 155"
*F350 1-ton - 137"
*F350 1-ton SuperCab - 155"
*F350 1-ton Crew Cab - 166.5"

'''1978-'79'''
*F100 1/2-ton SWB - 117"
*F100 1/2-ton LWB - 133"
*F100 1/2-ton SuperCab - 155"
*F150 1/2-ton - 133"
*F150 SuperCab - 155"
*F250 3/4-ton - 133"
*F250 3/4-ton SuperCab - 155"
*F250 3/4-ton Crew Cab - 155"
*F350 1-ton Camper Special- 140"
*F350 1-ton SuperCab - 155"
*F350 1-ton Crew Cab - 166.5"

===MOPAR car===
*115.0, 61.9, 62.0 -- 1975 Chrysler Cordoba
*NA,,,, 58.9, 59.0 -- 1975-'79 Dodge Aspen, Plymouth Volare 
*111.0, 59.2, 55.6 -- 1967-'76 Dodge Dart, Plymouth Scamp
*108.0, 59.2, 55.6 -- 1970-'76 Dodge Demon/Dart Sport, Plymouth Duster

===Mopar Truck===

===Miscellaneous===
*105.0, 58.0, 58.0 -- 1951 Cunningham C-1, C-2R
*107.0, 58.0, 58.0 -- 1953 Cunningham C-3
*100.0, 54.0, 54.0 -- 1952 Cunningham C-4R, C-4RK
*100.0, 55.0, 55.0 -- 1953 Cunningham C-5R
*100.0, 52.0, 52.0 -- 1955 Cunningham C-6R
*086.0, 50.5, 50.3 -- 1948-'74 Morris Minor

==Rearend widths==
===Chevrolet===  
<table align= border="1" cellpadding="4" cellspacing="0" width="500">
    <tr bgcolor="#FFF8DC"><td align="center" width="100"><b>Outside Width</b></td><td align="center" width="100"><b>Year</b></td><td align="center" width="300"><b>Model</b></td></tr>
    <tr><td align="center">57.75</td><td align="center">1962-1964</td><td>Chevy II/Nova</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">57.75</td><td align="center">1965-1967</td><td>Chevy II/Nova</td></tr>
    <tr><td align="center">58.00</td><td align="center">1978-1988</td><td>Chevy Malibu, Monte Carlo</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">59.50</td><td align="center">1968-1982</td><td>Corvette</td></tr>
    <tr><td align="center">60.00</td><td align="center">1955-1964</td><td>Chevy car</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">60.00</td><td align="center">1967-1969</td><td>Camaro</td></tr>
    <tr><td align="center">60.25</td><td align="center">1968-1979</td><td>Chevy II/Nova</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">60.50</td><td align="center">1984-1995</td><td>Corvette</td></tr>
    <tr><td align="center">60.50</td><td align="center">1964-1967</td><td>Chevelle</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">62.00</td><td align="center">1955-1959</td><td>Chevy pickup</td></tr>
    <tr><td align="center">62.50</td><td align="center">1968-1972</td><td>Chevelle</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">61.00</td><td align="center">1970-1981</td><td>Camaro/Firebird</td></tr>
    </table><br>

===Ford===    
<table align= border="1" cellpadding="4" cellspacing="0" width="500">
    <tr bgcolor="#FFF8DC"><td align="center" width="100"><b>Outside Width</b></td><td align="center" width="100"><b>Year</b></td><td align="center" width="300"><b>Model</b></td></tr>
    <tr><td align="center">56.50</td><td align="left">1969-1977</td><td>Maverick 8"</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">57.00</td><td align="left">1974-1978</td><td>Mustang II 8"</td></tr>
    <tr><td align="center">57.25</td><td align="left">1957-1959</td><td>Ford, Ranchero, station wagon</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">57.25</td><td align="left">1965-1966</td><td>Mustang</td></tr>
    <tr><td align="center">58.00</td><td align="left">1966-1977</td><td>Bronco</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">58.00</td><td align="left">1964-1965</td><td>Falcon</td></tr>
    <tr><td align="center">58.00</td><td align="left">1977-1981</td><td>Granada/Versailles</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">58.50</td><td align="left">1977-1981</td><td>Versailles</td></tr>
    <tr><td align="center">59.25</td><td align="left">1967-1970</td><td>Mustang, Fairlane, Comet, Cougar</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">60.00</td><td align="left">1967</td><td>Cougar</td></tr>
    <tr><td align="center">60.00</td><td align="left">1958-1960</td><td>Edsel</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">61.00</td><td align="left">1964-1971</td><td>Ford full size</td></tr>
    <tr><td align="center">61.00</td><td align="left">1949-1951</td><td>Mercury</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">61.25</td><td align="left">1957-1972</td><td>Ford F-100 pickup</td></tr>
    <tr><td align="center">61.25</td><td align="left">1960-1964</td><td>Ford full size</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">61.25</td><td align="left">1971-1973</td><td>Mustang</td></tr>
    <tr><td align="center">61.25</td><td align="left">1967-1973</td><td>Torino, Ranchero, Fairlane</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">63.00</td><td align="left">1970-1979</td><td>Ranchero &amp; Torino</td></tr>
    <tr><td align="center">63.00</td><td align="left">1972-1979</td><td>Ford full size &amp; intermediate</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">63.50</td><td align="left">1967</td><td>Fairlane (coil springs)</td></tr>
    <tr><td align="center">65.25</td><td align="left">1973-1986</td><td>Ford F-150 pickup</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">65.25</td><td align="left">1978-1986</td><td>Bronco</td></tr>
    <tr><td align="center">65.25</td><td align="left">1973-1986</td><td>Ford van 3/4 ton</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">68.00</td><td align="left">1972</td><td>Ford van 3/4 ton</td></tr>
    <tr><td align="center">69.25</td><td align="left">1977-1986</td><td>Ford E-150 van</td></tr>
    </table><br>

===MOPAR===    
<table align= border="1" cellpadding="4" cellspacing="0" width="500">
    <tr bgcolor="#FFF8DC"><td align="center" width="100"><b>Outside Width</b></td><td align="center" width="100"><b>Year</b></td><td align="center" width="300"><b>Model</b></td></tr>
    <tr><td align="center">55.60</td><td align="center">1960-1976</td><td>7 1/4 A-body</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">55.60</td><td align="center">1973-1976</td><td>8 1/4 A-body</td></tr>
    <tr><td align="center">55.60</td><td align="center">1966-1972</td><td>8 3/4 A-body</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">55.60</td><td align="center">All</td><td>8 3/4 A-body</td></tr>
    <tr><td align="center">56.00</td><td align="center">1932-1934</td><td>All Mopars</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">57.40</td><td align="center">1963-1972</td><td>7 1/4 A-body</td></tr>
    <tr><td align="center">58.54</td><td align="center">All</td><td>8 1/4 F-body</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">58.54</td><td align="center">All</td><td>8 1/4 M-body</td></tr>
    <tr><td align="center">58.54</td><td align="center">All</td><td>8 1/4 J-body</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">59.00</td><td align="center">1935-1936</td><td>All Mopars</td></tr>
    <tr><td align="center">59.14</td><td align="center">1966-1970</td><td>9 3/4 B-body</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">59.20</td><td align="center">1962-1970</td><td>8 3/4 B-body</td></tr>
    <tr><td align="center">60.00</td><td align="center">1937-1948</td><td>All Mopars</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">60.70</td><td align="center">All</td><td>8 3/4 E-body</td></tr>
    <tr><td align="center">60.70</td><td align="center">All</td><td>9 3/4 E-body</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">62.00</td><td align="center">All</td><td>8 1/4 B-body</td></tr>
    <tr><td align="center">62.00</td><td align="center">1971-1974</td><td>8 3/4 B-body</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">62.00</td><td align="center">All</td><td>9 1/4 B-body</td></tr>
    <tr><td align="center">63.40</td><td align="center">All</td><td>8 1/4 C-body</td></tr>
    <tr bgcolor="#F1F1F1"><td align="center">63.40</td><td align="center">1971-1974</td><td>8 3/4 B-body S.W.</td></tr>
    <tr><td align="center">63.40</td><td align="center">All</td><td>9 1/4 C-body</td></tr>
    </table><br>
	
==Axle to axle, rear differential==

===GM car===
*58.0 -- 1978-'88 mid size GM car, Malibu, Monte Carlo (1982-up metric studs), Regal with 10-bolt diff, 1965-'67 Nova
*59.0 -- 1968-'83 Corvette
*60.0 -- 1955-'64 Chevy, 1967-'69 Camaro, 1964-'67 Chevelle, 1968-'74 Nova, 1984-'95 Corvette
*62.0 -- 1989 Trans Am

===GM truck===
*60.5 -- 1964-'69 1/2 ton 2WD Chevy, Some GMC 6 lug rear end 12 bolt coil spring set-up

===Ford car===
*56.5 -- 1971-'77 Ford Maverick w/8" diff
*57.0 -- 1971-'74 V8 Maverick w/8" diff, all 1975-'77 6 and 8 cylinder engines, Maverick 5 lug w/8" diff, 1949-'51 Ford, 1957-'59 Ford w/9" diff 
*57.25 -- 1964-1/2-'65 Mustang
*58.0 -- 1980 Granada/Lincoln Versailles, 1967-'70 Mustang/Cougar/Fairlane
*58.5 -- Granada (year unknown)
*59.5 -- 1940 Ford 
*60.0 -- 1971-'73 Mustang/Cougar
*62.0 -- 1973-'76 Torino

==Related resources==
*[http://www.carnut.com/specs/rear.html Rear End Widths]
*[[Wheelbase database]]
*[[S-10 frame swaps]]

[[Category:Rearend]]
[[Category:Frame]]
[[Category:Identification and decoding]]

The following info was copied from Hemmings Motor News......
Rear axle widths
These dimensions do not include brake drums and are measured from backing plate to backing plate. Actual wheel track could be as much as 6" to 8"depending on drum size:
46" to 47"
'66 to '77 Bronco

48" to 49"
'72 to '75 Datsun pickup
'71 Dodge Colt
'72 to '73 Mazda

50" to 51"
'73 to '76 A-Body Mopar
'65 AMC American
'58 to '60 Thunderbird

52" to 53"
'28 to '40 Ford
'57-'59 Ford and Edsel
'63-'69 Falcon/Comet
'63 to '65 Fairlane
'65 to '66 Mustang
'62 Buick Skylark
'67 to '70 Mustang/Cougar 6 cyl. 
'71 to '74 Maverick/Comet
'71 to '72 Pinto
'68 to '69 AMX and Javelin
'63-'72 A-Body Mopar except 8 ¾" axle
'75 to '79 Granada/Monarch

54" to 55"
'39 to '48 Chevrolet
'41 to '48 Ford
'55 to '57 Chevrolet
'68 to '69 Fairlane
'67 to '70 Mustang/Cougar 8 cyl.
'62 to '70 B-body Mopar w/ 8 ¾" or 9 ¾" axle
'79 to'85 Toyota pickup
'68 to '72 Chevelle
'74 to '79 Mustang II/Pinto/Capri/Bobcat

56" to 57"
'70 to '71 Torino/Cyclone
'71 to '73 Mustang/Cougar
'60 to '64 Ford full-size
'61 to '67 Thunderbird
'58 to '72 Ford F-100 pickup
'26 to '39 Plymouth/Dodge
'67 Lincoln
'69 Dodge Van
'54 to '56 Ford pickup
'26 to '46 Chevy truck
'25 to '39 Chevrolet cars
'28 to '34 Ford cars and pickups
'49 to '56 Ford/Mercury car
'71 to '74 B-body and E-Body Mopar
'63 to '70 Chrysler C-body cars
'75 to '78 Maverick/Comet
'75 to '76 Dart

58" to 59"
'73 to '90 Ford F-100/150 pickup
'61 Chevrolet full-size
'65 Cadillac
'66 Buick full-size
'66 to '67 Chevrolet full-size
'69 Oldsmobile full-size
'72 to '73 Torino
'40 to '54 Chevy cars
'35 to '48 Ford
'35 to '41 Ford pickup
'55 to '59 Chevy pickup
'71 to '74 B-body station wagon 
'71 to '74 Chrysler C-body cars
'86 to '95 Toyota pickup
'78 to '86 Monte Carlo/Century
'68 to '83 Corvette
'68 to '74 Apollo
'78 to '86 Grand Prix
'76 to '80 Scout with 9" axle
'78 to '80 Bronco with 9" axle

60" to 61"
'40 to '52 Plymouth/Dodge
'26 to '39 Chrysler/Desoto
'47 to '55 Chevy pickup
'70 to '72 Lincoln Continental
'68 to '74 Nova/GTO
'76 to '80 Camaro and Firebird
'84 to '95 Corvette
'76 to '80 Aspen and Volare
'74 to '77 Jeep pickup

These measurements are from brake drum to brake drum:
56-1/2"
'74 Maverick

57" 
'75 Mustang II

57-1/4"
'65 to '66 Mustang 
'57-'64 Ford full-size
'57 to '59 Ranchero and station wagon

58"
'66 to '77 Bronco
'64 Falcon

58-1/2"
'77 to '81 Granada and Lincoln Versailles

59-1/4"
'67 to '70 Mustang 
'67 to '71 Comet, Cougar, Fairlane

60" 
'67 Cougar

61-1/4"
'71 to '73 Mustang 
'67 to '73 Torino/Ranchero with 9 ¼" axle

63-1/2"
'67 Fairlane with coil springs

65-1/4"
'73 to '86 Ford ¾ ton Van

68"
'72 Ford ¾ ton Van

This information will change as further information and corrections become available.

Ford IRS swap into pickup truck....
http://forums.truckinweb.com/70/8877806/ford/f100-irs-install/