32x17.50 When I measured it was the biggest that I could fit without stretching the wheel well opening. At the time I didn't want to repaint the car, but ended up repainting a couple years later anyway.

I had all the same questions as you. This was my first back half and I was probably too conservative when it came to cutting out the rear suspension and floor pan. I did it in probably 15 or 20 different sections carefully looking for tweaks and bends in the quarter panels, rear deck lid, roof, and glass. If I were to do it again, I'd set the car up square on a jig or jack stands and using a plasma cutter take out the entire back half in one big chunk.

This forum was extremely helpful. I have several gigabytes of pictures saved from the board members. Chris Alstons Chassis Works has some good online articles that were also very helpful during the process. Good luck and let me know if I can be of any help. There are more experienced people on this board that I'm sure will chime in as well. Don't forget to take a bunch of pictures!

Later,

Greg

Ride height at rest:


Suspension unloaded:



32x17.5, don't rub: