In cars like a classic Mustang, you'll often need some sort of external mounting device. This compact electric gauge setup from Auto Meter includes oil-pressure and water-temperature gauges. The small instrument panel or bezel allows a tight installation underneath the radio and heater controls on our '69 Mustang. The oil-pressure gauge costs $55.88, and the water-temperature gauge is $41.88. The bezel gauge panel costs $12.88.