1985 D150 "Mr. Curtis" race truck with a 2015 6.4

I love your project. Would loved to have dropped a gen 3 in a 78 Lil Red Express I instead sold. That said, I think it would be easier with better end result to mount the D150 body and bed on a late model frame. You should consider that. Seriously.

Well, i would. If the VIN would be attached to the cab of the truck. But it's part of the frame. And with the VIN goes the model year of the vehicle.
With the model year there comes a whole catalog of regulations to fulfil.
Obviously regulations for a 2005 vehicle are much stricter and harder to meet with a homegrown vehicle, than regulations for a 1985 made vehicle.

Not the baddest idea. But who likes the easy way :lol:

That's the point. Easy would have been to buy a late model Denali truck, lower it and go racing. Or a '05 Ram SRT-10. But they are heavy and ugly.