Adjustable Vacuum Advance AC31034

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Adjustable Vacuum AdvanceGM/Delco V8 points Type DistributorAC3103431034Gain instant horsepower & throttle response with ACCEL's Adjustable Vacuum Advance. Permits infinite adjustm ent to both amount and rate of advance. Maximum spark without damaging detonation (ping). Includes allen wrench and detailed instructions. Show more