You can install any gauge up to '85 in place of your original gauges. All yo need to do is use your original face and pointer and make sure the sweep is the same direction. I like to use gauges out of mid to late '70's Torinos, Rancheros, Tbirds, and montegos with the gauge option. The gauge is a 6 volt gauge with a voltage reducer to drop it to 6 from 12volts. Fords went to magnetic 12 volt gauges after that and we had the same problems GM had. All us ford mechs wished they nevver changed.