I don't think you will ever get a mirror with that long of an arm moounted in rubber (the front windshield) not to vibrate. At best you will cure it for short periods of time until it lossens up again.
The choices are attach to the top of the cab (like the '54) or go to a much shorter arm between mirror head and mount. You get too much mechanical advantage at the end of the arm. It's best just to put it back to stock.
