Hi - As everyone knows the instrument lighting on our old Mustangs is poor at best. I was driving my 66 coupe at night and even with the instrument lights at full brightness the lighting was pretty dim. I was looking for an LED replacement and found a 4 bulb kit from Scott Drake. It is part number SD-1895 and costs $16.95. They also have a 7 bulb kit but I don't think you need LEDs for the turn signal indicators and high beam indicator. I installed the 4 LED set yesterday and I am very impressed. Now the gauges are easy to read. I purchased the clear bulb set and kept the 4 blue plastic lens in the instrument panel. They also offer a blue set of 4 LED bulbs (SD-1895-BL) but I think you would need to remove the 4 blue plastic lens if you used these bulbs. Hope this information helps.