[AKGC]

Why not just pull the input cups (number 7 on the photo), out of the diff and not deal with the flange bolts?

 

[AKGC]

That may work but I’m not sure if the diff cover will come off while it’s mounted on the car because the cover has a mount on it and it’s very close proximity to the rear crossmember and I’d probably have to pull both rear tires off the car along with the brakes and axel nuts to be able to pull the axel assembly out
I’ll have to climb underneath again to take a look but I’m hoping to avoid all that

The Bk2 diff carrier is the same the BK1 (same part number).
The difference is the bk2 and bk1 half shafts are different, in that bk2 has the input cup-to-half shaft, where as the bk1 has the typical cv axle design.