Independent · Source-led · American performance history Issue 01 · 1951–2023
American Muscle Car Facts

Showroom arguments.
Race-bred answers.

General Motors option code

371  — Safe-T-Track differential

371 (Safe-T-Track differential): a General Motors factory option code recorded on 1 model across 1973, with installs and price where a source states them.

1 model · 1 model year · 1 source

Brochure spread of 1973 Firebirds: a red Trans Am with the big hood bird decal and a silver Formula, plus an orange Formula, blue Firebird, interiors and a wheel
1973 Pontiac Firebird line, including a Trans Am with the first large hood bird (1973 Pontiac full-line brochure)

Every sourced appearance

Year Model As named that year Price Installs
1973 Pontiac Firebird and Trans Am Safe-T-Track differential sales code $45 9,309 Reported

Every row traces to the source it links from on that model's own year page; this table only collects them in one place.