Hey everyone, New here - I have a 1980 z28 thats 100% original with mechanical and body. About 60,000 km. Like any reasonable car owner, I'd like to make more power. I'm leaning towards a new tech engine swap rather than a rebuild. What I'm wondering is if there is any value in a numbers matching Z. Would it be a poor decision to rip the original engine out to swap a newer fuel injected 5.3 or 5.7? Would it be worth keeping the original engine on hand? Thanks!