Nice van. I love A100s, first vehicle I ever owned was a '66 A100, way back in '68. Had two more over the years. Even had a chance to drive some new '68s at a job I had.
It would be a lot of work, but it might be possible to swap an auto OD trans in there. Chrysler put smallblock V8 727 trans behind slant sixes into A100s by using an adapter plate. One big problem could be the fact that the OD trans are a little longer than a 3 sp. auto and the A100 driveshaft is pretty short to start with.
I don't think there is anyway possible to put a floorshift manual trans in one of those. Good luck with whatever you do with it.
