Looks like the main trans. is the predecessor to an NP-540 series, CI cover instead of Al, 4 shift rails, don't know MN?

Looks like the 420 was shifted on the ground, in anticipation of the next load/grade.

Grill looks like '39-'40, GMC casting at top of grill, looks like '36-'38 style grill, perhaps late '38?

Interesting what engine lives there, could be 259 Buick rebadged, predecessor to 228-302 series.

Last edited by EdPruss; 12/11/2013 6:01 PM.

'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.