If you run into any difficulty bring the car by my son's shop in Thomasville--Grassroots Garage--tell Dan, Dave sent you. You'll need an open end 11/16 wrench for the top and bottom nuts and, I think, it's a 5/8 on the bolt head end. It helps to have a long extension with a universal socket to get on the top bolt head from underneath. Any starter meant for a B18/20 or B21/23 will fit-- the later starters will have metric threads where your bolt just passes through.