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-   -   3 Bolt Circle on Crank Pulley (http://www.clubcobra.com/forums/small-block-talk/120140-3-bolt-circle-crank-pulley.html)

Rick Parker 04-11-2013 09:52 PM

3 Bolt Circle on Crank Pulley
 
Is the 3 bolt circle on the Crank pulley for Ford and Chevrolet ever so slightly different? Chevrolet being the smaller??? I went to trial fit a pulley on Ford Spec ATI damper and the holes do not line up .030-.050 different???

FWB 04-12-2013 06:52 AM

yep, common on aftermarket balancers...i just open all three holes up on the pulley with the next size drill......

Rick Parker 04-13-2013 08:36 PM

Thanks, why don't they just make them the correct dimension instead of "One size fits all"?

LMH 04-13-2013 09:11 PM

China!
Larry

FWB 04-13-2013 09:33 PM

China? probably true, but this was still the case in the 80's, with aftermarket,
i look at it as laziness to engineer the part fully....kinda a modification from the GM part to just barely fit the Ford application,
look at MSD pro billet dist. its a GM modified, its too tall....for a rear mounted dizzy ok,...... but the front?


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