Ultimately though, GM soon realized that the cost ... with a 335 horsepower 400ci V8 (Ram Air III) Pontiac Only Ever Made 8 1969 Firebird Trans Am Convertibles In comparison to the elusive one ...

Firebird II and III followed, all designed to test the viability of gas-turbine technology for road cars. This concept car was designed by Bill Mitchell, another legendary GM auto designer.