Solid-State Voltage Regulator Conversions

If you mean the 5 Vreg in your dash cluster for the fuel and temp gages, search "voltage limiter" on ebay (pinkfuzzy or such) or posts here w/ other vendors.

If you mean the alternator Vreg under the hood, depends on what alternator you have. Post photos. I don't know Jeeps, but guessing might have the early Mopar "round-back" alternator. If so, see www.rockauto.com, ~65 Dart.