Having trouble with 86 C20 rear lowering hangers

[1970pelle]

I had bought all the parts to lower my 1986 C20 4X2 longbed truck. I bought everything from Western Chassis. The front end piece went together without any problems, I replaced just about everything there or rebuilt. I tore the left rear apart this week to install the spring hanger, the shackle I had put on earlier.
I couldn't see the differance in the hangers when the truck was together. Once apart the hangers are two different beast. Not even close. After three days of phone calls and E-mails with pictures and measurements. I and Western Chassis seam to be at a stand still. No cross words or anything, just head scratching on there part. They say the hanger are a bolt on.
So I'll show the photo's of what I have, and any idea's would be great. Thankfully I don't depend on the truck for daily use.

Thanks Ken