RE: Height difference with change to CM-6 plug??
The Rcexl ignition I have has a resistor inside the cap & the CM6 plug is a non resistor sparkgplug. It sure seems like a small rubber boot may work as long as the braid had a short wire with a lug bolted to engine ground. I guess a guy could set one up and do some extensive range checking. Capt,n
Below are photos. The caliper is set too 1 inch. With cap & gasket = 1.25 inch. All plugs in photo are 1 inch...with-out gasket.