I'm talking my buddy into swapping in a spare '66-'70 B body 8 3/4 that I've got under his '79 Firebird. The stock rear is 55.25" flange to flange, and 45 3/8" perch to perch. Anyone see a reason the 44" perch to perch B housing wouldn't work with off set shackles on the rear? That corporate 10 bolt junk needs to go.
As a side note. I told him to use elephant ears to swap a 440 in there. Anyone know of headers that would be a fit?