MB, I'm not sure what coils the installer put in. Just gave him a list of the gear I have, he talked to Dobinsons who supplied the coils. The front was easy...steel bar and winch, so height went up pretty much spot on 2". Rear (wheel carrier, fridge etc), it took 2 goes to get it right. First time the rear sagged 20mm, so took it back, but Dobinson went longer coils (rather than heavier). Now it's spot on, and I've retained plenty of flex..very happy with the result.
I'd recommend sitting down and listing all the gear you have (including steps and rack), then have yack to Dobinsons (or whoever). Be as accurate as you can with weights. A lot of suspension/accessory shops will just veer on the side of caution, and go heavier. Or get the front and rear axles weighed.
A guy I know went to this mob who just did just this..as a result the ride's crap and his truck has bugger all flex.
Yeah, it sounds like your front's sagging pretty bad (not great for handling and braking).



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