New old stock ACDelco R46TX "Acniter II" spark plug SET OF 8 GM #: 5613579 fits 1975 Chevy ALL 6 cylinder models.  We have individual plugs in stock as well, send a message if you're interested.

Over 30,000 OEM part lines in stock at our site GM, ACDelco, Ford, FoMoCo, Autolite, Motorcraft, Mopar and more.  Over 40,000 NORS part lines in stock across hundreds of brands and years from 1920's to 2000.  If you don't know the part number for your application send us an email and we can help you find it.  We have a large library of more than 6,000 parts catalogs and manuals to help with your search.  Come check us out: www.Connecticutclassiccarparts.com.