DITCH the double block GARBAGE. Keep the 2.5, but add a Belltech 6400 shackle and a short AAL. Those two will replace that SL block and give the same ride height. I saw 1.5" lift from each. OR....get expo leafs and shackle for a better ride and same ride height. Don't forget new U-bolts 'cause the SL's are crazy long.
The Duff baby bars will work fine for what they are....but I find, I still hop pretty crazy. Gotta love a manual and a locker. lol. Don't get me wrong, the Duff Bars everyone gets are great units and do a decent job, but with the weaker spring rate Expos for softer ride, the leaves don't help with the pinion pivoting . Ever since the Expo install, I've removed the bars 'cause I ran out of U-bolt threads. I've got the Duff long arm bars from a BII I hope to adapt to my Ranger, but will likely never get around to it. I'll probably fab a bar with a shackle and heim instead.