harmonic balancer and pulley 1957 270hp 2x4 duntov cam engine

[John G.]

I need information on specific details of the harmonic balancer and pulley for an early March build Corvette, vin 2665, 283, 2X4 carb, high lift Duntov cam engine.
Diameter of balancer, thickness of balancer, diameter of pulley, deep groove,
width of groove, pulley riveted or bolted to the balancer? Same as the FI engines. In researching the archives information indicates the 250 hp fi engine had a riveted pulley and the 283 high lift cam solid lifter engine had a bolted on pulley. GM part number, any casting numbers or stamping numbers? Do we have an expert on this??? Thank you. JG

[John H.]

Re: harmonic balancer and pulley 1957 270hp 2x4 duntov cam engine

John -

See my responses to your posts on this issue over on CF. Do you have the '56-'57 Judging Guide?

[John G.]

Re: harmonic balancer and pulley 1957 270hp 2x4 duntov cam engine

I do have a 56-57 tech and judging manual, I would like more specific information such as casting numbers, diameter of balancer, diameter of pulley,
number of rivets in rivet on pulley. I'm a little concerned about having or getting one from a later year car, how do you differentiate them. I am new to the ncrs site obviously, a little computer illiterate, How do I get to your responses "over on CF. Where is CF and what does CF stand for. I have read some threads on the subject from the last couple years but none have thoroughly covered the subject and I didn't find any of your responses. Thank you, John, in advance for your help in this subject. John.

[John H.]

Re: harmonic balancer and pulley 1957 270hp 2x4 duntov cam engine

John -

Here are links to your two posts (and my responses) on the C1/C2 forum at CorvetteForum.com:

http://forums.corvetteforum.com/c1-and-c2-corvettes/2227487-1957-harmonic-balancer-and-pulley.html

http://forums.corvetteforum.com/c1-and-c2-corvettes/2226862-fan-belt-pully-on-fan-of-1957-2x4-carb-car.html

If you have the Noland Adams 1953-1962 book, it has quite a bit of detail on '57 components in the RPO section.