That's some very good info Billy. I had never considered running the bars at different angles side to side... Your analysis makes perfect sense and it should work just fine...
I wish I had talked to you before I started my Astro van project. I have decided to go with leaf springs and home made Caltracs for my rear suspension just because I couldn't come up with a 4 link design that would work both in a straight line AND a cornering situation...
Ben,
Here is some more info from Alston's site.
http://www.cachassisworks.com/techtips.htm
This will give you some good info also and if you look at it from Billy's point of view you should be able to come up with a workable design...
Mark