Bought a 1970 318cid. Engine has 340X heads, new Holley Growler 600cfm, electronic ign., 3.23 sure grip. Had a cam that was too big for what I wanted (didn't want to idle, exh. smelled like unburnt fuel due to what I was told was the cam overlap?, and was doggy on take-off)and had 3,200 stall...