My car only has an 85mph speedo. Is it possible to change it to a 115 or 145? Not so much for the speed, but becuase it's @#$ing impossible to find a decent working 85 where I live and ebay never has them either. I was told it is just as simple as changing a sensor and maybe the computer, but no one I know seems to know for sure (and they thought they knew everything about them :P). It's an 84 with a 2.8.