Regarding thermo fans.......they are definitely the way to go.
If you can do some modifications (ie. cut and shape a bit of plastic), use a set of thermo fans off a VX commodore. There is plenty of plastic on them that you can cut to fit nicely to the radiator. I've done it on a Mustang and have a HG Monaro in my workshop which the owner took my advice and fitted a set to.
Decent wiring and a good thermo switch can make it look the part and keep it reliable. If it is done right, reliability and efficiency are improved.
If you are going to make it stock/original, that would be the only reason (in my opinion) not to fit thermo fans.

Ill be doing this to my HZ ute when the time comes. I also have a set of the GTS (rallye) rims for mine. A set of those would make your van look the part I reckon.

Are you going to show a picture of the rear end of the van?