Hello all, a while back I was on a thread that I can't remember now. I searched to no avail. The topic was about plugs, and someone was talking about a spark plug they used to be able to get. I believe it was a truck plug, built a little different than normal. Long story short, I found them on Rockauto, Champion plugs, part # 4130. If this is you, then there it is. Peace, Dave.