[pairodice]

We ended up ordering 3 (count em) three! Plugs from SilverLeaf to be sure we could leave on our trip and have engine monitoring since we have a new engine, trans, etc. Hopefully when I get there tomorrow evening I can figure out the wiring (thanks for the diagram Bill!) and it will all work. It looks like someone or maybe Newell already cut into the wiring for the original round plug and put the square plug in for whatever reason. SilverLeaf said that was a plug for a GAS engine...