Bill, I had an automotive machine shop grind my boat's reverse rotation engine's cam for more lift and duration. It was cheaper than buying a new reverse rotation cam. The small block Chevys have different rocker arm ratios, so they have more lift at the cam than the Ford 289 in my boat. So the shop ground my 289's cam to Chevy specs. I plotted the profile before and after, and it was like the lobes grew taller and wider. The funny part is how you grind a cam so the lobes get taller.
