1970 350/300 w/ C-60 & P/S Correct Pulleys
Have double 7 3/4" pulley w/ part # 39911013 BW I believe fits first on the crank shaft followed by single 6 3/4" pulley w/ part # 3751232 BB that fits inside the first pulley and is centered by two raised holes on the 7 3/4" pulley. I also have a single 6 3/4" pulley w/ part # 3876846 DJ I'm fairly certain is correct for the water pump. Additionally, I have a triple pulley w/ part # 3937787 AC. Two of the pulleys are 6 5/8" and the third is 7 3/4". It has a 3 bolt pattern. I'm not sure 3937787 AC belongs to this engine. Appreciate some assistance with correctly identifying and positioning of these pulleys. Thanks...Clark Erlandson 18941
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Re: 1970 350/300 w/ C-60 & P/S Correct Pulleys
Clark------
The balancer pulley is GM #3911013 (not 39911013). It's the correct one for your application. The GM #3751232 is the correct add-on single groove pulley for the power steering pump driver.
The GM #3876846 is the correct waterpump pulley for your application.
Pulley GM #3937787 was a 3 groove balancer pulley used on 1969+ passenger cars with C-60 and big block. It was never originally used on Corvettes, though.In Appreciation of John Hinckley -
Re: 1970 350/300 w/ C-60 & P/S Correct Pulleys
Thanks Joe...I appreciate your responses to this and my earlier threads over the last several months. I don't know where the big block pulley came and neither does the guy whose shop I'm using. Another good reason to photo the dis-assembly segment of the restoration process...ClarkComment
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