Before you have it fitted you might check that there is a little step machined on the inside of the ring. When searching the vendors for this part quite a while ago I noticed that CASCO's catalog read "with correct machined step," the implication being other vendors might not. (At least that's how I read it). without the step the ring will sit a little proud and not flush with the front of the converter. This in turn would move the rear of the gear away from the starter by the same tiny amount. Probably would not have any effect on starting capabilities, but might make the welding process harder. Just a thought.