Yeah, Andy's a good guy... I just don't agree at ALL with the use of auto plugs with mags. I've had the following issues:
1. Harness falls off the plug, typically on the bottom plugs
2. The screw on cap that the harness pops onto comes loose
3. Plug electrode aren't centered sufficiently to create a reliable spark (defective)
4. Heat range incorrect for application (this can be solved with research of course)
5. Radio interference (Seems to depend on a ton of factors)
6. Harness made for the mag comes apart at the mag side (It's a touchy setup at best on that side)
I've got a tad of experience doing this for the Forumla 1's and for RV's, and I'd say LEAVE IT ALONE! You won't save any money, I highly doubt you'll get a 'better' spark (more dependent on ignition system than plug), and you'll add quite a few more failure points to your system.
When I say you won save any money, it's because I've never heard of anyone running an auto plug for 1000+ hours, and the massive electrode Unison or Champions can do that easily if you rotate them every 50 hours.
If you have an EI system that already uses auto style harnesses, I can see justifying it, but converting a mag over isn't a good idea at all.
