I forgot about the solid front axels. That is something to look for.

Dodge did have a number of options for their vans that made getting in and out easier. One was a step for the side door that retracted when the door was closed.

Not many of these came with seat belts that were any good. If it is possible you should look into installing three point belts like we have today instead of just the lap belt these vans came with.

The Dodge also had a unit body construction, so a rust free one is important.

I would stay away from the Corvair, though, if you plan on driving it much. The fan belt makes a 90 degree turn and has a rather short life because of it. If it breaks, and it will, you will overheat in short order.