Our read

GarageScout Take

A dyno-backed 450 rear-wheel-horsepower Stage 1 455 with a Tremec TKO600 five-speed gives this GS a serious manual-performance focus, while the factory-correct Silver Mist and black-vinyl presentation keep its period identity intact.

Strengths

Stage 1 455 cubic-inch V8 with Holley 750 double pumper carburetor
5-speed manual Tremec TKO600 transmission
Suspension upgraded with Global West adjustable tubular control arms front and rear
Posi traction rear end and 4-wheel power disc brakes
Complete mechanical upgrades including dual electric cooling fans and Flowmaster dual exhaust

Identity & configuration