I have a few questions for you Mr. bgilbert, i currently have a 92 d250 ext. cab pretty much stock, i have since located a 83 w350 crew cab, it has a 360 with a 4 speed granny low manual tranny, not sure on the transfer case, it has dana 60 in the rear and a 60 up front with 4:10 gears. I am gonna buy a p pump 12 valve nv4500, truck and swap the 83 over to 12 valve, what would you do. how hard is it, i know the motor mounts will have to be changed, i also have a 93 d250 cummins donor truck with no motor, but it is a stick truck. all your knowledge will be greatly appreciated.