Well, partially fixed the problem. I replaced the connectors to the motor and the temps came down some. Did some driving on the road infront of the house, mostly just 0 to 50% throttle. After several minutes (much more running than the light driving I did earlier) the temp on the ESC was up to 130F, motor was at ~100, batteries...If I hadn't known I was just using them, I would have guessed they were another pack they were so cool.
I haven't added the power cap yet, or changed the center diff oil to something heavier, but I wasn't exactly hammering the throttle to throw the power to the front wheels either. I might step the pinion down a tooth...or wish I could, I only have a 16t and a 14t. We'll see what happens tomarrow when I get some more work done on it. Sigh, why does it have to get dark so early