Well here is what I do know. It's a 318 with j heads. I had 120lbs in each cyl before the build. I know this cam is gonna bump that up but how much? It also has an air gap manifold with a 2" spacer. Headers and 2.5" exaust. I just have to mess with it some more. I didn't check to see how much it advanced it plugged into manifold vacuum. I checked for leaks with a can of carb cleaner but it's sealed tight. How do I check if it's leaking on the bottom of the intake? If my vacuum readings are low will that be an indication? I'm at 18 deg now with no va. It's running fine. Still gotta get that rotor and check my settings with the can plugged in.