Hi All, Pertronix definately uses the Hall Effect...rotating magnets(I think they call it the reluctor) mounted on the shaft underneath the rotor induce current in a conductor which is then processed through an integrated circuit that tells the ignition coil to discharge at just the right time to send a high voltage to jump the gap at the spark plug...The Autolite 847 spark plug is still plentiful and inexpensive and designed for high energy ignitions, originally on GM big blocks, I think...I use the Pertronix coil(Flamethrower) and gap them at .060" and they work great. I use the Pertronix 2 on a few IH engines, but only the regular Pertronix is made for Chrysler 413...you just have to make sure you don't leave they ignition key turned on w/o the engine running- the little circuit board will fry if you do...this doesn't happen w/ the Pertronix 2. You also have to check your plug wires for leakage every so often, as the voltage at the plug is a lot higher and wires fail quicker- you notice this most when the air is damp!! But the performance you get is very nice from the 413 w/ cross rams... John Kuegel, 300F Sent from Yahoo! Mail on Android [Non-text portions of this message have been removed] ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylangYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: Chrysler300-digest@xxxxxxxxxxxxxxx Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/