This Firebird might not have left the factory with a V8, but I’m alright with that. Being an early Firebird convertible means that this car is quite desirable, but for many its inline six is a deal breaker. It currently has a V8 installed, so if you have to have a V8 it is already there, but I think this one deserves to have its original engine reinstalled. If you know your Pontiac history you already know the original six is an over head cam design, which was very advance for its time. This engine actually has a lot of potential, with Sprint versions putting out 215 horsepower and plenty of torque. With some work this car’s original six could put out decent power without the weight of a V8. Find it here on craigslist in Terre Haute, Indiana for $7,500. So would you keep the V8 or build the inline six and reinstall it into the engine bay? Special thanks to Robert R for this tip!