If you can't get your timing steady, or the engine "wanders" at idle, your distributor bushings are likely worn out. The Distributor distributes high voltage to each cylinder, and shaft play ruins accuracy.
NOS, NORS & Remanufactured Units
Points Style: Original cast-iron units with mechanical tach drives (Corvette) or vacuum advance cans.
Electronic: Upgraded or stock replacement HEI and Duraspark units.
The Shaft: Inspect your distributor gear! We also stock replacement gears and shafts.
