There is now a 1990 GMC day cab tractor sitting in the driveway....
It has an L10 cummins with turbo and Eaton 9 speed. Single axle plus tag.
Not sure of the fuel mileage because the previous owner didn't keep track. It seemed pretty good on the way home. Plenty of power and it sounds great.
I have been looking at the high mpg bullet truck and would like to get a list put together of the most important mods. I know rounding the front will help, and fiberglass will take care of that. How about a belly pan?
If you have ideas throw them out.
