The fact that it is rust free is a bonus. Like Martin says, back of cab is available. Unless you are an excellent welder, it would be worth paying a well researched body shop to weld it back on, the rest one could do oneself. If you don’t have paperwork, that could have been a late ‘54 or ‘55.

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.