WHAT DOES 454SS FOR SALE MEAN?

I'm advertising and marketing a pleasant 1972 Chevrolet (Chevy) Chevelle SS 454 Tribute motorcar. A true American muscle mass mass automobile or truck. The vehicle incorporates a completely new 454 Major BLOCK motor with about 8k miles that Appears good throughout the aftermarket headers and twin exhaust. The motor is back by an automated Th400 car