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⚠️ Optional equipment on some models; non-programmable capacitive discharge or transistorized unit; requires timing adjustment after installation
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 1972 Buick Skylark GS 455 455ci V8 Stage 1 and can vary by trim.
🔧 Built by master technician Chris Hackleman · Master Technician · 20+ years.