Maybe the wrong place for this but. . .

[ford nut]

i'm trying to get my ford 8 inch rear ready to go under my 36 but problems keep coming up. I bought this rear end for 50.00. great price, but one of the axles was missing, then they found it and shipped it to me. that cost 100.00. still ok to me. it had no drums, but I had some NOS drums left over from a project that ended up getting discs, so I want to use them on this project, but the register hole is to small. should I enlarge the hole, or turn down the super big, heavy duty axle hub? why it so big? here's some pics.