Totally respect your "home made tool" approach.... heck we've all torched and ground on tools to improve them for the moment. But if the OP has a chance to beg/borrow/rent that puller/installer from a Chrysler shop he'd find it just too easy to do. Removing the distributer on a small block Dakota, pull the bushing, drive the new one in and burnish it perfectly all while in the car with little to no effort..... somebody did their homework!