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

Not piling on, but I ran a '92 club cab Dakota with the 3.9 V6 automatic stone-factory-stock and went low 17's. But I think he understands his combo didn't perform well.
Yeah club cab with 5.2 is in the 15's in the 1/4.

Maybe you already mentioned it and I overlooked it, have you run the 1/4 and done mileage testing with the combo that is in the Duster now?