I am looking to install a 67 rear in a 65 fastback. Then use builllitt wheels to get away from the spacer since it is 2" wider. Anyone ever do this? Is the only reason for the spacer on a 67 to clear the fender?
Yep, I didn't to a friends car at the time. I swapped my 8" out of my 67 for his 66 rear end. I needed room for fatter tires and he need the rear for the same reason. We did need to use spacers on the rear.
I've done it and it works. However, I don't think that I would do it again as it really limits your options for wheels and depending on fender installation tolerances can result in very little fender clearance. Good luck!