Factory A-body Dana Wanted

i didn't even know there was such thing as an A-body dana 60...i think the guys are right about it being a b-body unit. if it was a b-body unit in length but designed to go into an a-body from the factory you probably wouldn't have to move the springs but considering it sounds like they're impossible to find if you get a b-body dana that's designed for a b-body you're gonna have to move the perches in about 1/2" i believe....