I USED THE NEW VINTGAGES IN MY 53 3100, HAD TO GET TRIM RINGS FROM DOC'S KUSTOMS, BE CAREFUL WE HAD TO MACHINE THEM SO THE GAUGES ACTUALLY FIT IN THEM , FOR THE MONEY THE GAUGES ARE WELL WORTH IT,, INSTRUCTIONS ARE EASY ALTHOUGH I REWIRED MY TRUCK WITH A NEW HARNESS FROM REBEL WIRING(ANOTHER GREAT PRODUCT FOR THE MONEY)SO IT WAS PRETTY SIMPLE AND THEY ARE THERE IF YOU HAVE ANY QUESTIONS..
