Doug, the guys who get it done with 9” tires have my respect. My car was nothing special originally, ( 2V 390), so I’m okay with cutting it. Once the roll bar was welded in the gloves came off.
I ordered the Strange complete third member 1.5 narrower than stock. I thought that would help with big rubber. It was not really necessary. I had 6.5” back space Weld Wheels and the wheels ended up coming in too far. 5.5” back space works with the Hoosiers which have a healthy section width. But that is with the spring kit getting the leafs away from the sidewall. So it’s a combination of things to get the 10.5s to fit.