Hey I don't want to air all my dirty laundry! Danny you're right about the R45TS they are standard. But they are the little skinny plugs and my old car uses the big fat ones. I bought the AC R45S and opened the gap up to .040" from .035" as suggested by AC. The mechanic suggested .045", but I decided to take baby steps here and see how they work first. I put them in a little while ago and the exhaust looked and smelled a little cleaner. I'm getting a little grey smoke out the back and am hoping it cleans out. I hope I don't need valve seals again. I did that in the car about ten years ago and it was a pain. It wouldn't surprise me though because the car hadn't been out of the garage in over 5 years before last weekend.