instrument cluster voltage limiter

FWIW, I did the 7805 upgrade in 2000 and it's worked flawlessly since. My oil pressure and water temp guages read higher after the swap than before and my fuel gauge didn't have a noticable change.

I hear complaints that the 7805 isn't rated for enough current. The 1A rating in these devices is without a heat sink, as long as you keep the internal junction temps within limits they can disapate a lot more power so use a heat sink. Also if you go to a place like Digi-Key there are 2.2 amp rated versions. There is also a 7806 wich is a 6 volt regulator if you feel you need the higher voltage.