rear main seal question, a 1986 5.0 crank in 1978 302 block - Ford Mustang Forum
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post #1 of 2 (permalink) Old 04-16-2010 Thread Starter
cookieman69's Avatar
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rear main seal question, a 1986 5.0 crank in 1978 302 block

hello, can I use a 1986 5.0 crank in a 1978 302 block the only difference I see is the 1986 uses 1 piece seal 1978 uses 2 piece seal but the 86 crank dosen't have the flange on end of crank will that cause a problem Thanks Mike
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post #2 of 2 (permalink) Old 04-17-2010
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The balance I believe is different. The 5.0L engine is 50oz while the 78 302 is 28oz. You'll need a whole 5.0L rotating assembly w/ balancer.

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