I am thinking that there is too little vacuum at idle and it is allowing the PV to open while idling, but I could be wrong i'm gonna switch to the block offs and check how that works along with going over the whole engine for vacuum leaks.

Also this carb is brand new out of the box, I put it on when I switched the cam.

Last edited by belvedere383; 04/13/15 06:32 PM.
65' Belvedere

496'' Stroker
Indy Heads