@IDIoit just beautiful.
My 88 7.3 same gears same rpm at same mph top speed is 72 mph at 3400 rpm n that’s downhill 9 mpgMine must have been the slowest in stock form then. '85 F350, DRW, 6.9, T19, and 4.56:1 out back. 3300 rpms at 65 mph.
The Ranger Overdrive helped, now she will get close to 90 at 3300 rpms, given enough time, favorable tail winds, and a semi for drafting....