Anyone shorten a rear to optimize a wheel/tire combo in an uncut A body?

What was your rear measurement after shortening? What size wheel/tire are you running? Not sure how similar the Dart & Cuda are as far as room?
56" rotor face to rotor face set up with Cherokee Rear Disc Brakes
51" rear end housing, flange to flange
17x9" Year One Mopar Rallye Wheels, 5" Back space, 275/40R17
Backing plate and rotor hub are a little thicker than drums...
Worked out the dimensions with Dr. Diff and Bill Scribner. Their math came out the same!
Scribner is narrowing my housing.
Custom Axles, Offset Hangers and new perches from Dr. Diff. He doesn't narrow housings anymore but still sells stock length.