I believe sinister makes their kit 1/8"npt, which is the standard thread size for most aftermarket pyrometer probes. Ford factory sensors are all 1/4"npt if I remember correctly. If you want to retain the pyro plate you have, I would make a quick trip to the hardware store and grab a drill bit and tap, fix it yourself. That will be the cheapest route. If not, I have 1/4"npt probe kits here. Id be glad to set you up with one. Whatever works for you