If you find a two ton truck, bolt on front wheel bearing covers, you can replace the spindles/hubs with P3500 HD, etc. disc brake units, build your own Delphi(Saginaw) power steering unit, find a D-80 or D-70 disc brake rear axle with matching wheel bolt pattern to handle increased loads and speeds, then just need to find a suitable engine/trans to work.

There are full width front fenders for ‘41-‘47.1 GMC trucks available(I have two sets) if one wishes to go that way.

Ed

Last edited by EdPruss; 03/07/2022 3:37 AM.
'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.