How to identify SB Ford heads without pulling them
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==ID'ing a 351 head== | ==ID'ing a 351 head== | ||
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The 351W is quite a bit easier, but it has some quirks. If it says 351 on the top of the head below the valve cover and has rail rocker arms it is a 1969-1977 351W head. The 1969-1977 351W head will use 16 intake manifold bolts as opposed to 12 for the 221, 260, 289, 302 and 255. In 1978, Ford made both the 302 and 351W head interchangeable with no displacement numbers cast on them.The last part is how to determine a 255 from the 302 and 351W head. The 255 will use small oval ports as opposed to the rectangular ports of the 302-351W. The only way is to pull either the intake or a exhaust manifold. If it has oval ports its a 255, rectangular ports it a 302-351W. | The 351W is quite a bit easier, but it has some quirks. If it says 351 on the top of the head below the valve cover and has rail rocker arms it is a 1969-1977 351W head. The 1969-1977 351W head will use 16 intake manifold bolts as opposed to 12 for the 221, 260, 289, 302 and 255. In 1978, Ford made both the 302 and 351W head interchangeable with no displacement numbers cast on them.The last part is how to determine a 255 from the 302 and 351W head. The 255 will use small oval ports as opposed to the rectangular ports of the 302-351W. The only way is to pull either the intake or a exhaust manifold. If it has oval ports its a 255, rectangular ports it a 302-351W. | ||
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