AJ - the spark jumps across the electrode to ground on the plug. The rest of the pathway is insulated to prevent grounding. Theoretically - the less resistance at the plug - the more energy there is to make that arc at the plug.
V=I*R
I did check some champions of the same type that were old - used, Ohm readings were all high in the 15 to 20 Kohm range- that's what lead me to checking and comparing new ones. Less resistance and consistent are good things when it comes to electron flow. When i put in the ngk's the car...
I took a more scientific approach to this question a few years back. I compared the primary resistance in ohms of new 4 each AC, Champion, Autolite, and NGKs all same application for a 340. Resistance values will give you an idea of the consistency and spark energy going to the cylinders...
I joined Facebook a while back and stopped using when I started getting all kinds of BS notifications. I stopped using it almost immediately after joining it. Maybe it has utility, for some folks, but I don't need it.
I had the same problem with my car. I ended up finding some good used windlace seals and installed them on the drivers side- passenger side was fine with the new repop windlace, so its probably variation in the sheet metal causing the problem.
Sorry for the late post here, I'll get out to the garage in the next day or so and take some pics. I ended up using some rockford fosgate speakers in those panels. I do not recall the actual model number of the speaker. I mocked the panels up in place and then measured the max depth that would...
I did the same removal and install on my 66 dart vert. It is a 6X9 speaker. Sometime later they went to a 4X10 speaker for the dash, maybe 67 ?
You will have to take out the radio, and heater controls in all likelyhood. I installed a dual voice coil speaker in its place. The retro radio outfits...
I will leave this post up until the end of November, then these are going to scrap. If you want them for free come and get them. I'm in suburban Chicago.
If no one wants these they will end up being scrapped - $50 for all 5 ? They are in pretty good shape, some minor rust along the edge of the rim where the hubcaps dug into the metal, otherwise really clean, a quick sanding and some black paint is all they need.
Up for sale are five (5) total 13 inch steel wheels from a 66 dart. In good condition for their age. $75 for all 5 you pay the shipping. Located in suburban Chicago.
I might suggest using quad 0 steel wool to polish the bores. Be sure to clean the cylinders meticulously afterwards. Either that or tear it down and clean it properly with new rings - at least. For the cost of a set of rings and a gasket set, that would be my path..my .02.