I had thought about the possibility of changing out to 3:55 ratio they have. Not sure if that might be to high for this area or not. i'm in SW PA, kind of hilly country. Though the truck as I got it low pressure 235 (car engine), original 4 speed granny gear transmission and 4:10 rear end with 6.50-16 tires on the back, seem to have pretty good lugging power on the hills. Usually once in high, it didn't need to be downshifted only on the long hills and at starts and stops. Never had to downshift below 3rd on any of them. Was getting around 14-15 mpg.
My thought were to go to the 3:90 and still use the 16" wheels, probably with 215 85R16 tires in place of the bias plies.
John
