86 MJ 2.5 AX5 converted to 4wd with HP30 from a 96 xj. Added a Rusty's 3" lift when I did the conversion. Has had bad death wobble ever since. Replaced trackbar with a new stock length, since there was some play in the old one. Seemed to make it worse. Aligned with 6 degree caster, not sure if that is enough, considering getting adjustable lower control arms to get the caster in the 7-8* range. As well as eliminate the question of worn out LCA bushings. Running out of things to check and don't want to just throw money at it without having an idea of what's causing it. I got underneath it and had someone cycle the steering, tie rod ends all seemed fine. Steering box is tight to the frame, I swapped that out when I did the 4wd conversion as the stock box was non power steering. Front drive shaft has new u-joints also done during the 4wd swap. Ball joints and wheel bearings all checked out fine. Track bar moves a very small amount at the axle, but it looks and feels like it's just the bushing flexing slightly. What am I missing? I can drive 40-50 down a washboard rough gravel road and it's fine. Get on smooth pavement and hit an expansion joint wrong and all hell breaks loose. Any ideas? I'm at my wits end and about to light this thing on fire