I got the brain from the Legion. Before the brain Rexs health was 242/242. After it jumped to 362/262. I thought it was current/max but I dont know anymore.
Either way he seams to be tougher and I see him in fights more so... Guess I cant complain.
@Zomboid... Before the fight were you able to go into the NCR safehouse where they were passing out food to NCR citizens? A few steps before the fight the King has you go talk to people in the slums about what the NCR might be doing in Freeside. Someone also suggests you talk to that one Dr. girl in the Mormon mission. If you talk to her she tells you about her NCR friend and tells you to go talk to her and say she sent you. The NCR girl tells you she sent someone to talk to the King but that they were killed. Pacer tries to pay you off not to tell the king so he is probably the one who killed the envoy. You tell the King they sent someone and he doesnt know anything about it and send you back to the NCR guys to smooth things over.