I think first you might want to see if a gasser or Diesel engine will work best for you keeping fuel mileage and initial cost in mind. Depends on long term goals like use per year, mountains vs. plains driving, short trips vs. long, Auto or manual trans. Hope you get the idea.

I sometimes it is easier to put an Art Deco(in your situation) cab and bed on a modern frame and chassis, retain engine, power steering, brakes, dealer service while on the road, modern electrics, etc, or modify an AD truck. Part of this is determined by how much work you can do, and how skilled you are.

Ed


'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.