Help with Scamp 440 locating 8.75 rear

Want a rear with BBP, find a rear from a 65-67 B. It's the closest to the A body in overall length with the right axles. Move perches in 1/2" on each side and go. If you wanted to go hillbilly, slot the existing perches for the difference.

That article is good, but, has some bad info. 62-70 rears are not the same.
http://www.moparts.org/Tech/Archive/axle/16.html