What engines will fit in a 1980 Pontiac firebird?

A 1980 Pontiac Firebird can accommodate various engine options, including the original 3.8L V6 and the more powerful 5.7L (350ci) and 6.6L (400ci) V8 engines. Additionally, enthusiasts often swap in modern engines, such as the LS series V8s, for improved performance and reliability. Other compatible options include small block and big block Chevrolet engines, depending on the desired power and modifications. It's important to consider the necessary modifications for fitment, such as motor mounts and exhaust systems.