Re: Swapping a 307 for a 350
Quote:
Originally Posted by Warrens69GMC
As long as the crate 350 is 85-under, you are good to go.
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Warren is absolutely right, but to clarify in detail: In '86 GM switched to the one piece rear main seal that removed the rear counterweight. Any V8 after that point has an externally balanced flywheel and a different bolt circle so they require the new style flywheel. If you have an aluminum seal adapter on the crate motor behind the flexplate, it is a one piece rear seal block so you will have to find a later style flywheel.
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44 Willys MB
52 M38A1
64 Corvette Coupe
68 Camaro 'vert LT1 & TH700
69 Z/28 355 12.6's @110
69 Chevy Short Step 4 1/2"/7" drop
72 Jimmy 4WD 4spd 4" & 35's
02 GMC 2500HD 4x4 Duramax
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