Yes, the vans are NON-Intercoolled. You COULD do something like this:
Jobe Performance - Intercoolers
Or you could run a smaller IC like this ('Mopar Kid' a few posts down):
www.neons.org :: View topic - Members Rides 1gs ONLY
Either way, your going to have to fab up something yourself. I don't know of anyone making/selling IC kits for the Vans. (Hope you can weld!)