IVR/Instrument Cluster Voltage Limiter on a 65 Dart

On a few cars I have owned that had bad regulators I hacked into the printed circuit
board and installed 7805 (5V regulators) on gas,oil and water gauges. I see some
have used Redline Engineering? has a regulator that better than the 7805 regulators? I am unsure of the maker (Redline) maybe some else can chime in. The 7805 can be purchased at Radio Shack if they are still in business? or on line.