73 swinger pro touring

So, on a 70 Dart, it looks like I should be able to run an 18"x8" wheel with a 255/45/18's in the back without moving anything.
I already have Hotchkis springs and a HemiDenny K-Frame for the suspension. I really did not want to MiniTub of even spring offset kit it, so this may work.

as i said in another post i have fender trim and if i remove that or smooth it down to the screw heads it would gain another 3/8" or so... this is on top of the clearance already there...