I have a 46 1.5 ton. Kept original frame and straight axle. Basically used parts of a mid-90s Chevy 3500HD. Used a dana 80 out back to swap out the 2 speed rear and keep it 10 lug. Used the front disc brakes and a custom machined kingpin to attach to the original straight axle. The rims are the 19.5" 10 lug.