Car is a Buick 1967 GS 400 with original motor. Just would like to know what spark plug brand is best. I know ac delco is original equipment. Engine is to original specs nothing after market at all. Any thoughts?What is the best spark plug on the market for sixties muscle cars from General motors.ie-Buick 1967 GS400?I use AC delco in my GM cars and trucks. From 57 nomad wagen to2005 silverado. Just ask for stock heat range in platinum they will outlast any other plug. Stay cleaner and won't foul as easy as standard plugsWhat is the best spark plug on the market for sixties muscle cars from General motors.ie-Buick 1967 GS400?IT depends on who you ask. I try to stay with the original equipment manufacturer. In your case it's A/C Delco.What is the best spark plug on the market for sixties muscle cars from General motors.ie-Buick 1967 GS400?a/c delco just what it came with newWhat is the best spark plug on the market for sixties muscle cars from General motors.ie-Buick 1967 GS400?
i would stick with original since everything else is.
i've heard the platinum plugs are good. don't know who makes.
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