[flyingA66]

66 V6 C motor...Ignition Question: Today I pulled the spark plugs(after a healthy dose of carb cleaner and air pressure to blow away the gunk, leaves, rat hair, etc.) and what I removed were 6 Autolite #66 plugs. Half of the exposed threads obviously were covered in gunk and were not in contact with any threads. It is a long reach, medium heat range plug, I suspect. I went to the local O-parts store and they sold me, after looking up the data, the same long reach plug. The question I have is that the threads in the cyl hd are for short reach plugs, the 3/4 inch size plug with the long reach when tightened down seats into the hole by friction not seeming to torque down correctly and the plug gaskets are not being compressed. Does anybody have the correct modernplug type that fits this application? Thanks