I'm relacing the 10 Bolt with a Dana 60 and I've hit a snag with the leaf springs. The center pin that runs through the springs has snapped on the drivers side. Can I replace this pin with a grade 8 bolt? Also, the existing center pins have a larger diameter on the cap then the holes on the Dana 60 spring perches. Should I try to enlarge the holes on the axle so the pin fits down inside or should I look for a center pin that will fit without drilling? Finaly the degree shim has been ruffed up some from the broken pin, but it's not too bad. The skinny end slightly bends up. Should I replace the shims or is it not all that important?