So, normally, when I build an A body I toss the 7-1/4 rear end and find a Dana 60 or 8-3/4 to go behind the huge HP monster I am about to drop in it. Well, I am keeping the slant six, so no need an expensive (especially to ship to Hawaii!!!) rear end just to go BBP rear end. I was going to redrill the 7-1/4 and do it that way, but you know, that old rear end has lots of years on it, and hard to find parts for it seems. Also- if I need new drums. I have to drill another set again, at least the drums. Pain in the keester! I build Jeeps mostly here. The CJ and the YJ are leaf spring suspensions. I went out and looked pad to pad, heck, the Jeep Dana may be a bolt in operation- and is 5x4.5 bolt pattern! I think I am going to try to slam this in, taking more measurments. but looks good so far!