I've got other trucks to, so I have'nt lost all hope. I'm on the search for the elusive 503 GMC six banger. God knows there's enough room under the hood of this beast for an Allison v-12, hhmmm! maybe one will fit?
'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.