5. 1970 Pontiac Firebird Formula 400
The second generation Pontiac Firebird debuted in 1970 as a mid-year introduction with a new body style and a couple of new versions. The only body style they offered was the coupe since they dropped the convertible for over a decade. Pontiac realized that traditional muscle cars like the GTO were slowly going out of style.
Instead, people were turning towards smaller, more nimble pony cars like the Firebird, so they invested heavily into that lineup. The first true muscle model was the Formula 400, which they introduced in 1970. The Formula 400 was a middle version between the base Firebird V8 and the fire-breathing Trans Am. The Formula had the 400 V8 engine with 330 HP.
It also came with a cool looking twin-scoop hood that could be functional if the buyer opted for Ram Air induction. The Firebird Formula 400 was fast, but it wasn’t exactly affordable. So, Pontiac only made around 7,700 of them for 1970 model year.