'67 crankshaft pulley with A/C and P/S

[Barbara S.]

Can someone tell me if a '67 small block crankshaft pulley with A/C and P/S is 3 groove or 2 groove?

Thanks!
Tony

[Gerard F.]

Re: '67 crankshaft pulley with A/C and P/S

Three grooves with P/S and A/C. P/S is the third position.

Jerry Fuccillo
#42179

[Joe L.]

Re: '67 crankshaft pulley with A/C and P/S

Jerry and Tony------

It may APPEAR like 3 grooves, but it's actually 2 pullies "sandwiched" together----a 2 groove pulley and a 1 groove pulley. No Corvette ever used a 3 groove crankshaft pulley-----no big block, no small block, and no medium block.

The only Corvettes that EVER used a 3 groove pulley of ANY type were 68-74 big blocks for the waterpump pulley (except L-88/ZL-1).

[Barbara S.]

Re: '67 crankshaft pulley with A/C and P/S

Joe. So, is it the regular 2 groove pulley that would be used for the alternator and A/C, then an additional single pulley in the forward position for the p/s?

Does the added single crankshaft pulley have the same diameter as the 2 groove crankshaft pulley?

Thanks.
Tony

[Joe L.]

Re: '67 crankshaft pulley with A/C and P/S

Tony-----

The 2 groove rear pulley, GM #3850838, is 7-21/64 OD. The single groove front pulley, GM #3751232, is 6-11/16" OD.