SELL

#Super Duty 455

Bare 1973 Pontiac SD455 engine block on a workbench showing the four-bolt main bearing caps and forged connecting rods
Car Features

The SD455's Special Block

Dan Reeves · · 6 min
Engine bay detail of a 1973 Pontiac Firebird Trans Am SD-455 big block with round-port heads and shaker scoop
Car Features

The 1973-74 Super Duty 455

Mike Sullivan · · 6 min
Pontiac Super Duty 455 V8 engine with round-port heads in a Firebird Formula engine bay
Car Features

The Formula 455

Mike Sullivan · · 6 min
Close-up of the 1973 Pontiac Trans Am SD455 big-block V8 engine bay with shaker hood scoop
Car Features

The SD455: The Last Real Muscle Car

Patrick Walsh · · 6 min