I replaced all the bulbs with LEDs in a non-Mopar classic. It made a big difference and no cutting wires. They make all different sizes, colors, and lumen output (brightness). More money didn't necessarily mean better. I tried expensive versus cheap LEDs from Amazon/ Ebay and didn't notice a difference. The only issue I had with replacing all the bulbs was a lack of resistance in the system. The turn signals didn't work until I installed a different flasher relay. I also installed an extra ground as I was experiencing a slight backfeed.
However, if you want the sequential tail lights, a LED replacement bulb won't give you that!