08 Expy EL rear suspension help

[The Sod Father]

I've scoured the Interwebs looking for air bags and/or stiffer springs for a 2008 Expy but it doesn't look like there are any kits available. I tow a 35' camper and would like to beef up the rear suspension so I do not have as much sag. My tongue weight is about 800'bs and the overall trailer weight is about 7,500 lbs gross. I am using a weight distribution hitch but if I crank it too tight I get porpoising, so my only other option is to beef up the rear.

Any suggestions? Does anyone know of a heavier duty spring that I can use?

 

[Expeditionary]

you could try doing a 3" or 2" spacer like Solismo but just on the back, Then you'll probably ride level with trailer. I know thats not what your looking for but it would accomplish it. Either way beefing up the rear end is going to make it ride ass high, so be ready for that