You can change the speedo by putting in a different drive gear in the tranny, but changing it by 50% is asking a bit much. The whole system is mechanically designed and run, so it would not be simple to change the speedo itself. If you could, when it reads 30 mph, it would really be 45 mph. You'd have to do the conversion in your head.
There are aftermarket dash kits for 65/66 that are electronic, expensive, but might do the trick...
http://clubs.hemmings.com/baymustang/platesmall.jpgLet me check your shorts! My multimeter is just a-waiting! Formerly known as Midlife in the old VMF.
King of the Old Farts *struts*
There are aftermarket dash kits for 65/66 that are electronic, expensive, but might do the trick...
http://clubs.hemmings.com/baymustang/platesmall.jpgLet me check your shorts! My multimeter is just a-waiting! Formerly known as Midlife in the old VMF.
King of the Old Farts *struts*