I would check Rock Auto for it.

Yes, a half-ton '53 GMC 228 inline 6 is a 100-22.


"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.