lbls1 said:
Those were 275's in the picture. The 315's are a real tight fit. For the front I used about a 7/32" spacer and ground off the nub on the arm that connects the upper control arm to the spindle. For the rear you need to use a 1/4" spacer, a BFH for the inner fenderwell, and to be safe I used a lip roller with a heat gun and completely rolled the rear fender lip up without cracking the paint. You can see in the picture below where I pounded in the inner fender(fresh undercoating)
Below is a picture of some homemade alluminum QA1 rod ended lower control arms.
I've owned about 8 F bods but the one below is the car I wish I still had. It's a 74 SD455 T/A. They built 212 of them that year with a 4 speed. This car was stripped to bare metal and repainted the original white in hand rubbed lacquer. The guy that did the work was a true artist. The car was absolutely flawless when he was done. It was so nice I was afraid to drive it. I remember covering the wheel spats with garbage bags when I autocrossed it way back. I scanned this picture I dug up, so the quality is very poor.
As far as the nitrous goes, I rarely ever spray it. I did have a chance to run a guy in a C5 ZO6 though. At about 140 I had about a 6 car length on him.