The engines that powered Pontiac's LeMans came in a huge variety of displacements and power outputs throughout its history.

The Pontiac Firebird was the Excitement Division's entry into the pony car market. This restomod convertible will soon cross the Mecum Auctions block in Indy.

The 326 was the inaugural base engine for the Pontiac Firebird's debut, supplying it with 250 horsepower, which was impressive at the time. The 421 would become renowned after being used by Joe ...