So have I. I was hoodwinked by classic catalog to buy their insert. not even close to fitting. And nothing out there to buy that will fit a 71 Dart Swinger. SO, I believe that charger426 has the answer. Build your own. After all I have a thousand bucks worth of Autometer gauges that need to go somewhere. Thats Hot Rodding?! As he said, tedious but not impossible.