67 Corvette 427/435 hp BBC Deep Groove Pulleys

[lbnaz]

I have a 427 L88 in a 55 Chevy with short water pump. What additional pulley is needed for the crank to drive power steering when changing from 66-67 standard short water pump pulleys and brackets to deep groove pulleys. The PS is a 68 SWP type. I'm putting Corvette 3883108 on the crank and 3906656 on the water pump. I need something to drive the power steering off the crank. Everything else lines up. I do not have deep groove on the PS. The alt. is deep groove. The photos show it with the standard pulleys. After hearing the Camaro here with the ZL-1 cam in it in the Chevrolet section I'm changing my L88 cam out for the same cam and want to do the pulleys at the same time. Thanks, Larry

[lbnaz]

posted it in the wrong section should be under technical I think

[lbnaz]

tried to move the category can't figure out how to do it.

[AMANOCC]

You need a three groove cast iron crank pulley, the last groove (away from the motor) drives the p/s pump. Originals are very hard to come by, not sure how the repos's fit/function. That would describe the Impala/Camaro set up, corvette ran P/s with your 108 crank pulley and a different pulley configuration, so you can look into that route as well.

[luzl78]

Should be 3869978 pulley. You can find originals on eBay for $250-400

[the427king]

Corvette BB never used 3 groove crank pulley..can use dual cast iron ps pulley like a 67 corvette and the 108 is fine, or use a single ps pulley and a triple crank pulley. Much more expensive to go the chevelle camaro 67 BB route than the corvette setup, especially having the 108 pulley already..the corvette double ps pulley has a groove behind the single making the 108 line up. WO power steering on a corvette or chevelle , one of the grooves in the 108 is unused.

[AMANOCC]

I have a BB corvette cradle for the p/s pump if you need one, looks like the one in the pics is Camaro/Impala.

[the427king]

Alec, you sure do find alot of rare pulleys and brackets. may actually be cheaper going w triple pulley because the corvette ps brackets are expensive and there is 5 pieces

[lbnaz]

Hello, thank-you for all the input. What about using a two groove 3941107 PS pulley wouldn't that line up also even though its not a deep groove until I could find one. I do have a 4 groove cast crank pulley looks like 3929698 trying to avoid that. What is the number of the double groove PS pulley you have Chuck is it for sale.