I'm in progress on a 41 3 window coupe. While I do not have the "X" frame to deal with, I'm still boxing what is not. A word, a 69 B-body rear is basically a bolt in, there's a guy near here that has a 40 with this set-up. He went the 383 route, kept the stock front, and hung a rack and pinion from some compact on it. It looks scary, I would not try that. I'm planning to do the Volare/Diplomat transverse torsion bar set-up, and going 440/6pack at this point, but if one of the new SRT 6 speeds gets written off

"IF YOU'RE UNDER CONTROL, YOU AIN'T GOING FAST ENOUGH."