EAWD & rwd, how much work to convert?

Hello

The facts:

My inlaws have a 95 EAWD which is in the rust belt (MN) and it's starting the rockers are starting the rotout. The drivetraine is doing good. My brother inlaw (their son) lives in TX where there are a lot of Aerostars without the rot that are 2wd.

Here's the question:

Are two wheel drives set up for 4wd just without the drive axel and transfer case? I would like to take the 4wd components and put them into a good body from TX

Thanks for your reply and insite.

Regards

Dan