So I got a rust free 1987 f350 crew cab dually 2wd as a donor chassis. Its got the 460 and a C6. I used to have an 88 4x4 f350 cc with a 460 and the zf5 spd... I'd really like to run the zf in this truck. I have access to a t19 trans from a 79 f250 2wd with a 400 in it. I think I have to run a 390 flywheel and clutch and clearance around the crank and run a 460 pilot bearing but I'm not sold on the no overdrive part...if I'm going to do it I want to do it right. It seems difficult to find a 2wd zf 460 trans used...all seem to be 7.3 models... any help or suggestions on tranny choices? Truck will be running 24" semi wheels with low pro tires and a 12-14' deck. Want a nice highway cruiser that will haul a small race car or motorcycles and sidecars. The 5spd was nice on the highway. Thanks in advance!