318 build #2 "cost minded" for the '74 Duster

It was 3160, no driver, no spare, 1/4 tank of gas. But since I've swapped the 7.25 rear for 8.75, 14" steel wheels to 15" steel wheels in the back, plus I went to a heavier duty drive shaft. I would think we are easily 3200+ in the same conditions.
rear tire size i forget