For those going through the same drill putting wide, deep backspace wheels on their projects, I thought I would post a couple of pictures of the wheel mock-up I built to verify clearances. By raising and lowering the car, turning the wheel to 30 degrees, and rotating the mock-up I was able to locate all of the areas of interference. It is amazing how much the wheel moves around in the wheel well when you go through lots of compression, especially with a good bit of caster gain. A "static" check of fitment at ride height won't catch all of the possible areas of interference.
Pappy