Buy Intellitronix DP7001W at JEGS: Intellitronix LED Digital Replacement Gauge Panel 1965-1966 Ford Mustang. Guaranteed lowest price!
So I bought the above gauges. In the instructions for the speedomter it says to "Connect to the corresponding White wire on the sending unit or the output of your transmission. (Connect the other speedometer sending unit wire to the ground, preferably to the same exact location as the gauge ground.)"
I have a T-5 from a 1993 GT, and when fitting it originally to the car we just used the standard speedo cable into the back of the 1966 cluster. Does anyone know if there was an electronic output on a 1993, or do I need to buy something like this to convert it?
Honestly, I hope I can convert as I have 3.73's and my speedo has been +10mph. These new gauges can calibrate speed over 1 mile of distance accurately, negating the need for a different tooth.