Hello everybody, I've had a few classics before but new to pontiacs, but just became an owner of a '67 firebird with the non-sprint six, auto trans. This car has probably sat for 20-30 years but is in pretty solid shape. I'd like to keep the six for originality and numbers matching off to the side, but I'd also like to drive around with a V8. What is the best motor swap that can be done without messing or changing with the other original parts of the car?

Where has been the best resource for parts and sheet metal? NPD?