LED replacement bulbs for 1965 Dart cluster

I read through some threads but I’m hoping for clarity. Can I replace stock bulbs with LEDs with no modifications? Do I need a limiter for instrument lights? If so can they be used for all the lights? Turn signal indicators, oil pressure, high beam indicator? Should I? I think I remember that there were two types of bulbs used on 65 Darts. If true how do I tell the difference?