Posted by Larry in CA Central Coast [66.214.72.204] on Monday, December 13, 2010 at 00:36:28 :
In Reply to: What spark plugs do you use on your flathead six? posted by junior [64.136.27.228] on Sunday, December 12, 2010 at 21:16:10 :
Champion J8C in the WDX, J11C in the WD-21, but can't remember why the WD-21 got the different heat range