B B-nut Senior Member Jan 20, 2017 #1 Can I run a set of Champion 31 spark plugs in a Model T ? They look very similar to the Champion X. If so then where in the heat range would they stand? Any info? Thanks
Can I run a set of Champion 31 spark plugs in a Model T ? They look very similar to the Champion X. If so then where in the heat range would they stand? Any info? Thanks
