Another good choice for a donor m/c is the '70s-80s Chevy ½-ton. I bought a new one from Rock for not that much more than a re-built.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.