This is my 4th Mustang but the first one I've owned since 1977. Now I know why older guys always had the nice ones (I am now one of those older guys) I think this one will be staying around for a while. I just purchased a 66 coupe, Wimbledon white with black interior. It has the 289 4bbl with a C4 auto and factory A/C. It's in really good shape even compared to the ones I owned when they were only 8-12 years old. I just added a relay driven switched power terminal strip under the hood for any electrical accessories that need to be added down the road like the electric fuel pump I just installed. I also installed relays to feed switched battery power via 12 ga. wire to the headlamps using the original low/high feeds to trigger them. No more dim lighting up front. These relays currently get their power from the switched power terminal strip so I don't have headlamps unless the ignition switch is on. I'm not sure if I will keep that configuration or use unswitched/direct battery power to the relays. I am currently redressing the interior, rebuilding the heater box, and correcting some unprofessional wiring under the dash.

Does anyone know what causes the gas gauge to read 1/4 tank no matter how much gas is in the tank (reading does go down with key off)? I had heard that the constant voltage unit makes the gauges peak when it goes out.

 

welcome to the forums! check out the classic section

 

Welcome to the forums. Seems like you have a nice classic, which is why I recommend that your repost in the Classic's section. You;ll get a quck answer I bet.