Advance the cam about 6 degrees and find a very pleasant surprise. It's a lot easier with a Chev V8 but it can be done with Cloyes multi slot gear. In the old days we had to make our own stepped woodruff which are now avalable. Remember the cam turns in the opposite direction of the crank....Good Luck


216.158 MPH 12-Port 302 GMC on 70% 171.0 MPH 302 stock head on gasoline 7 years later