I'm wondering if I bought a screwy mount from a member here a few years back. Heck of a time to find out. I cannot install the ignition harness on the slick mags with them installed on the engine. The only way is to install the harness on the distributor and then play hell trying to install it on the engine. This has made it nearly impossible to time it. I tried making marks with sharpie to get it close but the 105° heat index makes a great sweaty eraser out of my hands. I'm interested in seeing photos of Lycoming 360s with slick 4300 series with impulse couplers if anyone here has a few to share.