Up for sale is a brand-new factory-style vacuum spark advance canister for 1973-1987 Chevrolet and GMC C/K series trucks, Blazers, and Suburbans equipped with a V8 HEI distributor (SBC 305/350, BBC 454). Perfect for replacing a ruptured or leaking factory vacuum pod to restore your truck's proper timing advance curve, smooth idle, and optimal fuel economy. No other items included with this listing.
