No, not entirely true.
The B body axle had the spring mounts at 44” center to center. The A body is 43”. I’ve heard of dudes just spreading the leaf springs to mount a B axle but to me, that is a hack move for dudes that don’t have a welder.
for what it's worth, Jeep commanche trucks have I think 42" center to center, and spring under axle stock, and width is (depending on sources) 59.5 or 60".....may be able to use offset shackles and not even have to cut/weld perches....
