greetings and salutations to all … I'm running into an interference challenge between the firewall and ignition harness with an 0-200-12 installation on a J3. I have slick 4300 mags and a new Champion aerospace harness . The new harness has aluminum strain collars. These collars protrude beyond the cap and the result is a tight 90 degree turn of the ignition leads. I'm hoping that some of you with 85, 90 or 200-12's can share what ignition harness / magneto combination works in the tight confines of the j3. Its an experimental category build . thanks Tom