spark plugs for 1958 inline six - The 1947 - Present Chevrolet & GMC Truck Message Board Network

studeclunker · 11-29-2020, 10:38 PM

Okay, we have a one to one-and-a-half ton truck and I would rather use the hotter plugs recommended in the service manual. I searched on line and Autolite 306 is a recommended replacement for the AC-46. Does that sound right? I just want to make sure I have the plugs I need and NAPA has given me the colder plug, Autolite 303 (Comparable to the AC 44). We are coming on cold weather here and I need the old man to start. He's kinda sleepy in his old age.

11-29-2020, 10:38 PM	#1
studeclunker Registered User Join Date: Mar 2007 Location: Fawn Lodge, Ca. Posts: 305	spark plugs for 1958 inline six Okay, we have a one to one-and-a-half ton truck and I would rather use the hotter plugs recommended in the service manual. I searched on line and Autolite 306 is a recommended replacement for the AC-46. Does that sound right? I just want to make sure I have the plugs I need and NAPA has given me the colder plug, Autolite 303 (Comparable to the AC 44). We are coming on cold weather here and I need the old man to start. He's kinda sleepy in his old age.

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