Rookie
Posts: 4
Joined: Sat Mar 31, 2018 11:03 am
Spark plug extension
What is the purpose of the extension? The OD threads of the plug and extension look to be the same, but I didn't measure them. The truck had a corn sheller mounted on it for most of its working life. I also noticed that the distributor timing was advanced as far as it would go (about 12 degrees BTDC.)
The other '47 KBS-6 that we're using as a donor parts truck doesn't have these extensions.