Hello Bolters, Can someone explain the green rings on AC spark plugs. 4 rings, one thicker ring ect? Thank you. Don, That explains the "GM" on one box re years produced. Thank you.
1967 GMC 9500 Fire Ladder Truck "The Flag Pole" In the Stovebolt Gallery 1946 2-Ton grain truck 1946 3/4-ton pickup, 1953 1-ton pickup 1957 1-ton flatbed dually, 1954 Pontiac Straight Eight Of all the things I've lost in my life, I miss my mind the most!
The ribs are there to prevent flashover. At one time the original equip. plugs didn't have the lines. Evadently they are decorative. The old Delco batteries didn't have the raised letters or the caps painted yellow on the original equipment bats. George
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne Super In the Gallery Forum
