Gold Lifetime Member
Join Date: Jan 2005
Location: 2 Dog Town in West Texas
Re: Odd Harmonic balancer size on 327
Nate, It looks like you have the same timing cover as I do, rigid. You currently have a wider balancer , 1.750" and I have a 1.250. Its a GM HIPO part that is 6.750 diameter.
I have 1/2" room behind my balancer and you have less. You probably have the widest of all , BUT pulleys on all still bolt in the same bolt circle pattern, .
All GM sbc balancers are the same distance from the face of this pulley bolt circle to the end of the crank snout , this is where they stop on the crank.
So If you order a Proform, Fluidampner, ATI, 6 3/4" diameter , they will all bolt up the same. I am using a 12551537 balancer.
You should not have any issues using the pulley you have.
TC # 349
Zdld17:69 Z/RS,306, NOR141111, 9N554XXX, 12A, X3G, 59/59,723, AFR 195,CCC282/290HR, TKO 600, BU1122B1E Owner since Dec 1968
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