Harmonic Balancer

A friend of mine just went through this with his ATI dampener. He decided to have a stock pulley shortened, but I think you can go with a March pulley that is to short and add a 3/8” spacer from mancini to get the right alignment. Now his was a 440 block, but I think it still is an issue with the small blocks. March has some good info on what the stock measurement is.