I'm a newbie to mud and the proud owner of a 89 FJ62. This my first post to mud. I recently installed one of Man-a-Fre's 4" OME lift kits with a shackle reversal. After finishing the lift, I hopped in the 62 and headed to my Dad's to weld it into place per recommendations. At about 22mph, I encountered the in-famous DEATHWOBBLE. After coming to complete stop and..."Cleaning out my shorts"... I turned around and limped her back home. Immediately got on mud and starting searching...That's where I learned about Caster. Took her to the alignment shop and she's showing to be 5.5* degrees negative. My question is: What degree of shim should I use, 4* or 6*?. I plan on running 33's and she'll be my daily driver with light wheeling.