A 3800 is a Chevy. Your GMC is designated a 250. Both are 1-ton trucks.

That is a beautiful truck. In my opinion it would be a shame to butcher it up for a V8. I'd rebuild the 228 or find a 270 or 302 to build for it.

Also, there's no need to go 12V. The 6V system has served it well for over 50 years. As long as all connections are clean and secure it will last at least another 50.

"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.