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Old 08-10-2014, 6:42pm   #13
JRD77VET
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Quote:
Originally Posted by aj View Post
It was the 454 that was external balance. It required correct flywheel.

I discovered my 71 had this problem after I bought it. Ran OK up to about 3500 rpm and then started serious shake. New flywheel and about 4 hours on my back under car and all was good. Well, there was the rear tire problem where they started wearing out very quickly for some reason.
The 400 small block is externally balanced also ( which means the 383 is too )
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