I agree with Frankenchevy- the ORD springs are quite amazing. You get up to 14 inches of travel out of them (you will need custom shock mounts to have a shock this long).
I too was getting tired of getting "beat up" after long days on the trail. I've bashed my head against the steel roof of the cab for the last time! So I upgraded to ORD springs (*front only for now)
However with that much travel/movement I found I quickly overheated my Bilstein 5100 shocks. I bought some Bilstein remote reservoir shocks and they stay much cooler. Of course I live in Montana and don't deal with the Arizona temps.
Technically I think they way I should go is to get some Fox or King remote shocks with internal bypass. That way the spring is dampened better if I hit something really hard. Right now I'm just relying on a 4.5" bump stop. Or... they do make hydraulic bumpstops (basically another shock absorber). I haven't done much research on those yet.
That being said with my setup right now I've seen bumps come up suddenly when I'm doing 30-40 and have cringed bad... as in this is going to hurt! And the truck just goes right over it and I didn't get bounced off of the cab roof. It is SO much better than it was before.
It still isn't a side by side with 20+ inches of suspension, but it is close enough, plus I can still use mine as a truck to haul stuff. (I did ORD shackle flip in the rear with longer stock springs. This rides better than stock, but not as good as the custom ORD front springs).
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