Fun and games for all. For a mere $650, exchange, Royal will snake out that overworked little engine in your GTO and slide in the 428, all prepared for action. And now, speed-crazed sports fans ...

This led to the development of the "Royal Bobcat" program, through which Royal Pontiac offered dealer-installed 428 V8 engines. These engines were tuned to exceed the high-output rating of 390 ...