you are spot on my friend....I've kept kinda quiet aboiut this as I no longer have a e series at all, This is probley the first time since 1979 that I've not had at least an E350 van, and most of the time a van and a class b+ or c...
the problem, if you call it that is most all E series are over sprung in the front and under in the rear...the norm before sumo's for me was to just take it to the spring shop , add a rear leaf, and put softer springs in the front...
I've put sumos in the front and they make it real harsh riding and take away wheel travel....big bumps get transferred right up though the frame...
the bilstien gas charged shock is by far the best option... and is a huge benefit on was board roads and keeping the tire hooked up..
sway bars is another huge mod...and even more so on the E350 class c and vegas models as the rear end is 4'' narrower , and the frame is thinner and the get a lot more frame twist and flex...
the rear sumos, when installed behind the rear axel.... huge difference... if fact, that's all I usually do... I put the 235/85's and rear sumo's and just run it with great results...I leave the stock shocks, sway bars, and every thing as is... I get the front aligned to 5 degrees caster and go...with my 22E I towed a 22' trailer loaded to 10k....of coarse I up'd my hitch to 10k..it pulled like a dream
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