Spark Plug Confusion ??
Hi, we have a 2007 Winn with a gas 8.1L Vortec engine. I want to replace the spark plugs and wires. According to the manual I am to use AC Delco 41-983 plugs. Yet when I check NAPA, Advance and O'R...
Forum Discussion
What Workhorse chassis makes a little difference. Some have 7.4 and others 8.1.
