A GMC of that vintage would have had a 228 or 236 engine. I've never heard of an "old 240". A 216 is physically shorter than a GMC engine besides being not near the engine in function or performance. But it's your truck.


"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.