We thought we had the wrong distributor for a night, becuase the old one was so worn that when we held the 2 next to each other to compare, the shaft dropped a half an inch out of the body of the distributor. So we thought the gears werent aligned. But we rechecked and they are. There IS an extra 1/2" extention in the oil pump drive on the distributor shaft, which we can'te figure out what it is suppose to be for. The pump drive shaft meshed with the distributor drive, so what the hell you know?

Matt