I have the old long arm kit where the upper and lower arms are connected.

Been pretty happy with it so far but really wish I had more flex in the rear.

The rear shock does not drop very much at full droop while the front fully extends the rubber boot.

Is anyone running this or a similar setup?

The main difference is in the control arms. They are longer, 4 link, and angled now.

Thanks.

https://www.roughcountry.com/jeep-long-arm-upgrade-kit-78600u.html

 

I believe you mean you have a radius arm system up front. As for the rear, it usually isn't the control arms that limiting your axle travel. Have you made sure your brake lines aren't acting like limiting straps? Or the rear anti-sway bar?

 

Was going to disconnect the rear sway bar but read it does not make a major difference in flex but does make the drive considerable worse.

You made me want to run and check my break lines haha. No but they are good.

I will say I broke a rear upper control arm bracket once and that added a bit more flex. Was at full droop and the axle dropped quite a bit when the bracket broke.

 

Correct, the anti-sway bar shouldn't make a difference if it's got the correct size links installed. If you still have factory links, it could limit axle movement. I'm still doubtful that the control arms are what's limiting your travel.

 

Disconnect the shocks and verify that they have travel left in them? (rather than just looking at the boots)
Loosen the bolts on the control arms ( while sitting on the ground under vehicle weight) and verify they aren't bound up?