PCV Valve Question - Big Cam

[Al P.]

My 1967 427 BB engine has a big overlap cam that has 8-9 inches of vacuum at idle. What PCV# valve should I be running? I have read that the stock one called for a 435 HP is not the correct one for this cam as its not the 435 HP Cam. Mine is more close to a L88 cam but a bit bigger - What is the PCV part Number for a 1968-69 L88 Corvette? I think its 736 but not sure. Thank You

[Joe L.]

Re: PCV Valve Question - Big Cam

My 1967 427 BB engine has a big overlap cam that has 8-9 inches of vacuum at idle. What PCV# valve should I be running? I have read that the stock one called for a 435 HP is not the correct one for this cam as its not the 435 HP Cam. Mine is more close to a L88 cam but a bit bigger - What is the PCV part Number for a 1968-69 L88 Corvette? I think its 736 but not sure. Thank You

Al-------


L-88 used an AC CV-746C and that's exactly the one you should use.

[Al P.]

Re: PCV Valve Question - Big Cam

Thanks Joe - Are they still available to buy anywhere?

[Joe L.]

Re: PCV Valve Question - Big Cam

Thanks Joe - Are they still available to buy anywhere?

Al-------


Yes, still available from GM or Delco dealers. GM part number is 6484525.

[Al P.]

Re: PCV Valve Question - Big Cam

Thanks Joe!