Super Stock Springs - Let's see em'?

I used the relocation kit that moves the springs 1.5" in per side, allowing a 295-50 Radial TA on my 69 Valiant with stock wheelhouses. Mounted on 15X8.5" Centerlines. Using the 3 inch inboard kit, which puts them into/under the frame rails, allows even more. I wonder if tail pipes can still be routed, however, with the 3" kit. It looks tight with the 1.5 kit, and I suppose it also depends on whether you have the larger gas tank or not.
Hope this doesn't make you more confused!
Alan