I added Roadmaster Active Suspension on my Ford Ranger, which with my FWC Eagle shell was just at the truck's GVWR, they sort of returned my truck to its normal height in the rear. They took care of the road handling, such as sway and lean etc. I was happy with them on pavement, the truck cornered like it was empty.
Then as I added things to the shell's interior, which translated as weight, the rear height dropped. I use the truck/eagle combination for both on road and off road trips. Also, the Eagle never comes off the truck, so I wasn't worried about a hard ride with an empty truck.
So I was disappointed that the Roadmasters didn't keep my height and I lost ground clearance. I heard about a company in Grand Junction, CO by the name of Alcan Spring Company, when I was at Overland Expo West in 2017. The only thing Alcan does is manufacture springs and u-bolts.
Here is an except from their website:
Maybe the title of this page should be "Product" without the "s". After all, we really only make one product: custom leaf springs.
However, in Alcan Spring's 26-year history, we've custom-made that one product in just about every possible variation for every vehicle you could imagine. From go-carts to 10-ton dump trucks; from the family car to drag cars; from stock-replacement pickup truck springs to the most exotic rock-crawlers and desert racers.
Bottom line: No mater what your leaf-spring needs, Alcan Spring has the experience and skill to deliver exactly what you want.
http://www.alcanspring.com
After checking out the website I called them on the phone, they were extremely helpful. I told them I wanted a 1000 lbs more carrying capacity and the original height. They would have added height if I wanted it, but my wife has enough trouble getting in and out of the camper at the original height so I opted to not add any height. I gave them a credit card to start the order. I had the option of having them shipped to me or picking them up in person, I opted to pick them up and have them installed at a local shop in Grand Junction recommended by Alcan. 6 weeks later they contacted me and I made arrangements to pick them up and coordinated an appointment with the shop. It cost me about $800 for the custom springs, new u-bolts and the install.
Best money spent, wish I never bought the Roadmaster Active Suspension. They are now hanging in my shed.
We just got back from Big Bend Ranch State Park and drove some very rough 4WD roads. The truck was awesome. We met some Jeep Rubicons and Toyota FJ Cruisers on the roads, they were impressed we had made the 10 miles to Chorro Vista.
I can't speak to how the setup would work if I had an empty truck.