if its a JX jimny, with now power windows, no power mirrors, then it wont have power steering
if you pump the tyres up to 28 psi it will be easier to steer, im runing 30x9.5's with no PS on a 2010 jimny
death wobble can occour, but how to get rid of it is well documented. you just have to be prepared to do the work to fix it. like minor routine maintenance.
viewtopic.php?f=5&t=15499&hilit=death+wobble