Depending on the load you are towing, the V10 may get better gas mileage than the V8.
I just towed 10,000 pounds with my 5.4L SMB, OD off the whole time and burned a lot of fuel maintaining 70 Mph.
With the correct spring, you can get ~2 inches of suspension lift - we do this without issue!
You can correct the Camber with Alignment Sleeves - we do this without issue!
You can correct Caster if you want to, because you are a "welder/fabricator" and it is easy to do - we do this without...
Sorry, we are not a website. We build vans and do suspensions, keeping the website current is never going to happen. Every job is unique as is every customer and their needs - hard to price that out on a website. Custom valved FOX Shocks are $129.95 - that much I do know.
We have done RIP...
Agile Off-Road offers custom valved FOX Shocks for your van. We have done several Chevy/GMC vans with great results. Much improved over the Bilstein Shocks that were removed...