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Old 06-17-2006, 13:46   #1 (permalink)
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5.0 HO crankshaft

HI,
I have a 5.0 HO engine probably from the early to late 80s that my brother and I are rebuilding. I got a call from him today and he told me that the crank is bad and that we would need a new one. I had another 302 engine probably early to late 70s but he pulled the crank and called me to let me know it was different than the one from the 5.0 we are rebuilding. My question is, is there a difference between a crank for a 5.0 and and 5.0 HO engine? The 5.0 has a rod length of 5.090 and will be bored .20 over.
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Old 06-19-2006, 18:14   #2 (permalink)
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Re: 5.0 HO crankshaft

In 1982, Ford went from a 28oz imbalance to a 50oz imbalance. By moving the extra weight to the flywheel and balancer the engine is more steady at higher RPMs. If it's a 1981 or older crank, don't waste your time with it. 1982 and newer should all be pretty much the same.
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Old 06-21-2006, 00:52   #3 (permalink)
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Re: 5.0 HO crankshaft

Sounds like its time for a stroker build up! :D

Seriously though, avoid swapping crank imbalances. It messes with your pulley selection, harmonic balancer choice and flywheel/flex plates. I am building a 5.0 with 289 vbelts etc and have had a number of issues related to the minor differences between early and late model setups.
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