could the 7.3 be replaced with a 460 gas burner to get more power or would that be a waist of time ?
HahahahaHAHAHAHAHAHahahaha...*cough*
1993 F350 (Our "Tree-fiddy") pulls a 34' trailer at about 10K lbs. DRW, 4.10 rear, E4OD, 6.75 MPG more or less with a lot of time in OD. Maybe get about 90 miles on each 18 gallon tank. 64 MPH is where she likes to run, load or no load. With the 24' box at 7500 lbs we got 7 MPG. Empty, maybe 10 MPG without a head wind.
Best internet quote ever on the 7.5L gas: "It's Moses, it'll part the gasoline sea and pull anything across."