If you have a groan when you let off the gas that was not there before, it could mean the gears are not set up correctly. Do you have a photo of the gear tooth pattern?
SWEET Sergeant At Arms: Old Dominion Stovebolt Society BUNS?!?!?!Where we're going, we don't need no buns..... 1950 GMC 450 1951 Chevy 1/2-Ton The GreenMachine In the Stovebolt Gallery