is it possible to have a 6" lift and still have really good handling like my 3.5" aev lift? if not, what is the limit for good on road handling, 4.5, 5.5 ?. I do some light trails, but mostly dive on the road/hwy and want to sit higher without loosing the way my jku rides now

 

I would stick with what you have. You would have to spend a lot of money to have relatively good handling. Included would be going to a long arm kit for sure, driveshafts front and rear,and draglink would have to be addressed like a flip kit. If it was me I would go flat flares and 37tire route before I would do what your contemplating.

 

i have draglink flip kit and front shaft. was considering just moving up to aev's 4.5" springs and bumpstops before i put on 37's cause my jeep seems to sit a little lower since i installed front and rear bumper & winch.

 

Depends on how wide and long you want to go. Wheel backspace, type of arms, any stretch, and axle width are all going to come into play.

 

I just want to sit a little higher without loosing the great handling i have now

 

Don't count in it ^
6" is a ton of lift and without cutting CA mounts and relocating them with longer arms.
Also roll centers, raising the rear TB and front along with a drag link flip to keep drag link/TB parallel.