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If 302 and 351w heads interchange, why are there different length pushrods for 302 that have 351w heads? Does anyone have the length's for a stock 302, and for a 302 with 351 heads?
 

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it has nothing to do with the heads per say, its the different deck height that affects the pushrods.

Rick
 

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There are a lot of variables such as what year block, what year heads, type of rockers, valve height. Your best bet is to get a pushrod length tool - I believe that Crane sells one - and purchase the pushrods for your particular engine. Or you can get the adjustable type pushrods so long as you stay within their operating specs.
 
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