Posted by R. Metcalfe on March 20, 1998 at 13:51:28:
In Reply to: Spark Plugs Explanation posted by T.KRALOVIC on March 19, 1998 at 11:09:32:
Mike Fleig, the head mechanic at Vintage Power Wagons in Fairfield, Iowa, recommends AC R45 plugs for use in Civilian Power Wagons WDX-WM300.
I would try using those.