8 3/4 are hard to come buy so good luck on that unless you already have one. haha i am running an 8 1/4 behind my 360 with a suregrip and 3.23 geras getting ready to swap to 4.10 when the 8 1/4 blows up will probably do a 8.8 ford swap
Only thing I don't like about the 8.8 is that it's not a pumpkin type carrier.
I had the 2nd prototype W/OEM inner Ford, outer LX CV joints. The current 8.8 ford LX conversion has flanged inner CV joints so the center section can be swapped in less than 45 minutes.
Although an A body 8 3/4 would be next to impossible to find here in the boonies, I would bet theres lots of them around in "B" & "D" bodies that are rusting away.
