Cadillac engine knowledge
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| + | Identification info gleaned from a dozen books / manuals plus personal experience: | ||
| + | Block casting # (rear of block, behind intake, near oil pressure switch): | ||
| + | '68-'69 472: 1486238 | ||
| + | '70-'76 472 & 500: 1485200 | ||
| + | '77-'79 425: 1609110 | ||
| + | '80-'85 368: 1615255 Carb 1620734 EFI | ||
| + | Crank Casting #: | ||
| + | '68-'74 472: 1486424 | ||
| + | '70-'76 500: 1496793 or 1495094 | ||
| + | '77-'79 425: 1609142R | ||
| + | '80-'85 368: 1609142 | ||
| + | Stroke (stroke can be measured through spark plug hole if it will turn) | ||
| + | '68-'74 472, 77-'79 425, '80-'85 368: 4.060" (less than 4 1/8") | ||
| + | '70-'76 500: 4.300" (more than 4 1/4") | ||
| + | Head Casting Number (usually in the center of the head under the valve cover): | ||
| + | '68-'73 472 & 500: 1486250, 1497902, 1495950 | ||
| + | '74-'76 472 & 500: 6024493, 6024552 | ||
| + | 472 and 500 heads have the last 3 digits of the # in a recess under a center intake port, visible from the lifter valley with a mirror. | ||
| + | '77-'79 425: 1609112, 1609423 (last 3 usually on driver's front / pass. rear exhaust port) | ||
| + | '80-'85 368: 1615188, others I don't know. The 4-6-8 head is substantially different than the regular head, and the rocker assemblies are not directly interchangeable. | ||
| − | + | A fairly comprehensive 2 page PDF ID guide with pictures can be found here: | |
| + | http://www.cad500parts.com/tech/EngineIDPages.pdf | ||
Modifications and Swapping. | Modifications and Swapping. | ||
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