340 Engine Shake

You could throw the original cam back in and see what happens if it comes down to that...I did watch the video, and at first glance it seemed like an aggressive cam lope, but then I saw that rhythmic vibration pattern...its a stumper for sure.

The main reason why I upgraded the cam was to take advantage of the aluminum heads. Otherwise I would have left it. This is the one I had before. COMP Cams CL20-212-2: High Energy 268H Hydraulic Flat Tappet Camshaft & Lifter Kit Lift: .454" /454" Duration: 268°/268° RPM Range: 1500-5500 - JEGS High Performance