Because of where you are at now, John's idea is the easiest fix. Just use a whizzer wheel on your air grinder and an old camshaft and cut those little grooves (mine are straight) in the cam. Then stand the block on it's bellhousing and using oil and a drill and cut the bearings to size. Having said that, now I use Cab's way and do the bearings one at a time, test fit, and use a bearing scraper (or the side of a flat head screwdriver) if needed.