Screwed around with the pop yesterday, the Mallory in it needed another petronix unit which I did not have on hand, had one for a dual point so built one up and tested it on the sun machine., put it in, no spark. Dammit, troubleshoot the system cant find anything wrong, cant be the new unit right! Pull it put it on the machine again, the unit is dead. First petronix 1 I have had fail. Put another in and get him running, but a lot of popping in the exhaust on the passenger side. Think a valve is leaking, have to do a leakdown test today, this will be fun with the tri-y headers. Hell plug change on 4 and 6 is with three different wrenches!:BangHead::BangHead::BangHead::BangHead::BangHead: