Simon,
DV got it right, I also have a classic rd. with a 9 inch and 427 side oiler 4 speed toploader. The rear should be off center just a little as DV said, now I dont know if you inside frame rails run back like mine as mine is a 1993 Classic and there is very little room for the drive line between the inside rails. I had custom 4 link bars built as the stock one did not center the rear in the wheel archs. I dont remember what I set my angle at but I could look in my notes. I have no wheel hop and the car goes strright runs low 11. I did built a custom coil over for it also.
Andy
