I just checked the truck out and i cannot I.D. this engine. It has 8 bolts on valve covers, real wide across the intake manifold, front distributer, the runners on the intake manifold dont go to the forward cylinders, they start at the second ones. eek I cannot find any company markings on it. The water pump is a huge unit that looks like a turbo casting, strange. Someone out there knows what this is.......Rick

'36 Tall cab Chevy 1.5 ton, '36 Low cab Chevy 1.5 ton, '53 GMC 2 ton, '51 GMC 640 5 ton, '47 Dodge 2 ton, '42 GMC CCKW 353 6X6.