Should I replace the worn out 350 in the 63 GMC sub 4x4 that I got last July with another 350 or as a friend suggests with a 283 with the right stuff to be more fuel efficient?

Will the truck be underpowered?

I plan to build the engine on the bench this winter and have it swaped in in the spring.

The truck now has new power breaks (drums) and power steering.

EB

Last edited by Peggy M; 06/06/2023 9:36 PM. Reason: added more info to the title