['72customdeluxe]

yeah a gen 3. I know it's pointless to pick the smaller motor over a 6.0, excpet in oneway, the mileage. If I did it in the near future, it would go infront of my th350 with a big cooler, converter, and a shift kit. In the future, built 2004r with lockup. They have ls1 throttle body t.v. cable set ups and that would be cheaper to put bigger power too than a built 4l60. It would retain the mechanical speedometer too. I'm thinking with the all aluminum 5.3 and no emissions plus tri-y's and duals etc. could get me 22mpg... If a 5500 pound modern crew cab can do it, why can't I?