Mini tubs, advice, do's & don'ts?

If you're just going to split the wheel wells and move the inner half in, take your time trimming the trunk floor. It's easy to cut to much out.

I moved my rear end back 1" to make it easier to fit the 325 radials. I also made a fixture out of angle iron that the wheels/tires could sit in to measure the rear end width. A floor jack was used at each end of the fixture to raise the tires into the wheelwell then I slid the tires side to side to get them where they needed to be. It made getting the rear end width easy.