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Old 02-28-2021, 06:24 PM   #5
51504bat
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Default Re: Interchange? for 1957 3 speed>to full synchromesh?

Quote:
Originally Posted by darrell View Post
i done this on a 57 many years ago.in 65 they changed their bolt pattern but the old holes are still there.im not sure about the 63 64 one but the later are 3 inches shorter.thats the biggest thing.if you use one from a small block 260 351 you need the grind 3/8 of the imput shaft.just small things.

Many (but not all) of the post '64 full synco 3 speeds were drilled with both the wide and the earlier narrow pattern.
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