68-69 B body info needed...

I agree it seemed the 440-6 and hemi 68-70 B bodies had danas, where I had a 70 Hemi Cuda that came with an 8 3/4. Go figure, I bet those B bodes could have been ordered with a 8 3/4.
RM will be the clue, and corresponding vin stamped on sheet metal seals the deal.