I researched a while when I dove in to getting my D ready for PF. Personally I was afraid to venture too far from OEM components. Over the years I have observed lots of issues when folks tried different stuff when it comes to the spark. The one issue that concerned me the most is the coil. The resistance, the ECU and induction unit all need to work together for proper performance. Mechanically, the rotor, cap, plugs and wires were a lesser concern to me although the spark plugs should be in the correct heat range for the engine. So, move away from OEM and I see lots of mismatch possibilities and guess work unless there is some engineering involved. That's when I looked at DMCH's Nology stuff. A bit pricey but, the engineering appeared to be there to suit me. I have been very impressed so far with the Nology kit. A noticeable kick too. I especially like the performance at the higher revs. I also had the engine analyzed for emission performance after the tune - super clean - passed with flying colors. I did get a new OEM NOS coil from DMCH to have a "fresh" unit and BTW it is less expensive than other "replacements". Nology has a coil amplifier engineered for that unit. The Nology wires are cool looking but you really don't see much of them once you have everything back together. I also got all the Hervey switching that comes with new rubber and his neat marking system for easy hookup, Hervey's silicone vacuum hoses, and heater valve. I have Grady's deluxe water pump kit (thermostat, gaskets, etc.), silicone coolant hoses, seals and bolt kits. The only thing I had to fabricate was a coil wire. Go figure, Nology does not include a coil wire with the set. So, I got a Taylor 8mm Pro silicone coil wire from the local speed shop and made my own. Harold McElraft - 3354 --- In dmcnews@xxxxxxxxxxxxxxx, Louie G <louie@xxxx> wrote: > Hi List, > > I'm about to take off my intake manifold to replace some vacuum components on my car, and I figured while I am in "the valley of death" that I'd just go ahead and replace and upgrade all the components in the area. I'd like some advice or experience on upgrading my ignition system. To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/