What brake booster master cylinder do I need duster

You need more that a booster and MC. You need the brackets which stand-off from the firewall and have a lever. You won't find those at an auto parts. I have seen a complete new setup (brackets, booster, MC) on ebay for ~$170 (a great deal). The booster appears based on a GM one (threaded rod), but they give you all the parts to connect to your Mopar pedal.