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Old Yesterday, 05:44 AM   #1
papsoldblue72
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Join Date: Apr 2008
Location: Somerset, Kentucky
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Question 4.3 to 5.7 swap

I have a 91 c1500 4.3 5 speed manual and I want to swap the old tired 4.3 out with a good old 350 2-piece rear main seal. my question is can I use the 4.3 flywheel on it? thanks for any info.
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Old Yesterday, 01:27 PM   #2
kwmech
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Re: 4.3 to 5.7 swap

Nope, the 4.3 had different balancing requirements
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