just bought the bronco went to get things for tune up asked for 1982 302 plugs and brought them home. once i pulled the first one, it was diff size, the threaded end of the plug in the truck is biggest i have ever seen. went back and they dont show anything but the 6 cyl 300 that uses these plugs. I have an 8 cylinder in the truck. anyone familiar with the autolite 45, and hwo can I determine what engine I have or if the heads were swapped possibly in the past.