I am keeping the body.
For just the 110 roller (including fuel tank and newish fuel tank cradle$$$$) I would ask $2500.
I can email you a pic of the rear x-member. It is toast. I don't have pics of the rest of the frame yet, but I looked and there is still paint on basically all of it.
To use this to convert a 90, you would need to replace the rear cross member on this frame (150-350 for the part depending on how fancy you want), install a 110 rear drive shaft (I have this, you can have it with the package for a couple bucks) extend a few wires, plub the fuel lines, brake line and find a 110 body of your choosing.
edit: here is a picture of the rear cross member from ECR's site when it was there:
The cross member filled with mud and rotted from the inside out. The rot extends about 8in up the bottom of the drivers frame rail. The rest of the frame appears fine and a cross member with extentions like:
[scroll down to see the repair]
New x-member and paint/waxyoil and you should be more than good to go with a little effort (or get ambitious and send the thing to be fully gavlanized)