hot and cold is your best friend for AV7 rebuilds. Freeze the crank (the longer the better really), and heat the bearings at about 350. CAUTION: If youre using the FAGS, they have a plastic bearing race as opposed to the ZKLS which use a metal bearing race. I learned the hard way that the FAGS melt... thats why i only get ZKLS now, you can heat them as much as you want.
Once you have your crank cold and your bearings hot, your bearings will literally drop right to the bottom of the crank, no coersion necessary.
Once you have the bearings on, do it all over again except now putting the full cranky assy in the freezer, and the case halves in the oven. Still havent mastered this step of the process yet, but its not so bad. I lube the crankshaft up a bit with 2 stroke oil, dunno if that helps at all. Then once i get the crank seated in a case halve, i kinda just tap it with a rubber mallet to help everything get seated. Once again, i dunno if that helps at all but it sounds about right.