Timing Chain & Sprocket Kit: 301 Turbo TAFull HD 301 Pontiac Timing Chain & Sprockets.. Not a cheap basic product or band but dependable and absolutely 1st grade US Cloyes brand Set The 301 was used first on 1977 Firebird (and other Pontiac vehicles too) right up to the 1980 & 81 Turbo Trans Am 301 editions. Different from normal Pontiac V8's of the era. This is a do it ONCE and do it Right type of part. Pontiac Timing Chains are also A LOT easier to change then Chevy by far.. but just don't