Thanks for the replies, I've been lying under my 72 with the R&P off the 84,from my initial measurements it seems to be plenty wide enough & I don't think I'd have too much trouble mounting it, only problem is it would steer backwards because tie rods on 72 hook up on opposite ends of hub than the 84, looks like I could swap hubs, left to right & right to left & mount R &P on front side of cross member but the oil sump presents problem. Still brain storming. I went on Total Control websight, didn't see one for 72, but after seeing prices on available ones, not an option. Any thoughts? Thanks again.