c4 to aod conversion?

You can use your stock shifter if you like, but you'd need to buy a kit that allows you to do so. With that, you'd also have to get a kit for the kick down which would involve removing the tranny pan and flipping the tranny linkage 180*.

CJ Pony sells the complete kit which includes the transmission mount, slip yoke, kickdown linkage and shifter linkage.

All in all, it's pretty simple.