02-15-2005, 06:30 PM
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Seasoned Member
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Join Date: Apr 1999
Location: Portsmouth,
VA
Cobra Make, Engine: Unique 427 S/C, Dart 427W "Replica" Ford engine
Posts: 584
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Not Ranked
Mike;
I believe the 289 was a 5 bolt through late '64 and changed to 6 bolt for '65 through '67, when it was replaced by the 302. Unless you're a stickler for correctness you may be happier with a 6 bolt as it tended to be smoother and quieter.
Bill Stradtner
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Threaded Mode
