Tronman’s suggestion of the Caddy engine is an interesting one. You could look at the BOP 455’s as well. I have known of folks using the Buick or Olds in a Chevrolet vehicle.
I think the Olds swap is more straightforward as one can use the engine mounts for an Olds 350-based Diesel Adapting the tranny to the BOP pattern might be a PITA in a big truck.
I sort of assume this isn’t a truck that gets driven 10’s of thousands of miles in a short period. Finding your swap candidate nearby and just keeping it simple is probably the way to go.
That’s where the BBC, even with some short-comings, becomes the most practical candidate. Common as dirt. Going to make plenty of torque even if smog equipped and detuned.
Last edited by JW51; 09/16/2025 3:44 PM.
