1973 Mustang interior lighting

Not standard interior lighting, more like "mood" lighting, but if thats what you are after.  I ran blue LEDs under my gunwales. Used the string type that comes on tape backing.  There were fiberglass supports under the gunwales. It was a 76 ski tique vs your 73 mustang, so I am guessing pretty much the same structure.  I took 1/2 inch pvc piping and put it in above the supports that held the piping in place. I stuck the LED strips to the PVC but didnt trust the sticky back to hold so I used a bunch of zip ties as well.  Mounted a switch under the dash since I didnt want to drill any new holes or mount any new switches.