I currently run a .030 over 318 with 8.5:1 compression, Comp XE268 cam, headers, Holley 600 carb, 904, 3.23 gears, and 2300-2500 tc in my 73 Duster. The tires on the rear currently are 235/70/15s, which are about 28" OD and 7.5" wide. I run SS leaf springs, so the rear sits up a tad.
I am...