[Mike V. Florida]

Originally Posted by hardtimes

Hey Jim B,
I’m with you in your statements on this subject
However, I’ve spoken to a well known (here ) engine builder of A/B engines. He was giving me instruction on the D block (similar to B).
He told of this gear mod.
Above, Dan is doing/selling this mod. So I’m looking into any ideas for possible improvement to an engine build.

You do know who Jim B is right. Your cam was probably made by him. I think he knows a thing or two about engines.