Help - need small spark plugs
I'm trying to cram a D&B 3.7 twin into the cowl of a Carden 30% Extra 300. The problem is the spark plugs are rubbing against the cowl, and won't let the cowl fit properly.
I've got NGK-CM6 plugs now, but could use another 1/8" of clearance. Does anyone make smaller plugs? I need some - bad!
Help!
-Doug Brindle