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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