If you want a real quick solution, call Mancini Racing and have them send you their "Ball Bearing" pilot bushing that fits into the recess where the torque converter snout normally resides. It's quick, easy, and requires no machining of bushing, crank, etc.
They've worked great for me over the years. Click here:
http://chucker54.stores.yahoo.net/pilotbearing.html
Southernman
