upgrading steering due to death wobble, opinions please!

ok, so after the recent installation of the 37's i have met the unfortunate death wobble evil. i recently did 4" PP coils, 5100's, PP track bar drop, drop pitman, and PP comfort control arms, but ran it that way with NO alignment on the 35" Toyo's for about 3 weeks, and it just started with the 37's. had it aligned today at the dealership to the caster settings recommended to help, and same issues. dealership stated there was a good bit of play in the tie rod ends and steering box (i have a BD brace) and that the stabilizer is leaking (old Rancho). Found a good deal on the 08.5 steering upgrade, so ordered that to start. What about steering box? Im thinming redhead, as im not chanfing out my brand new drop pitman to use the mopar upgrade box. Any luck with parts store boxes? Now need to pick a stabilizer to go with it. Can i use a 5100? and all help is appreciated!