[Alex V.]

I'll just repeat what a few others have said. There's a good chance you can rebuild your (original) engine for a good bit less than you'd have in the crate 454. The original engine isn't a big selling point like it is in collectible passenger cars, but it doesn't hurt its desirability and keeps the truck more authentic. And, even if your block is bored too far, it's not big chore to substitute another block.