Ozrockrat
Expedition Leader
You can get the F450 center jump seat console (with integrated seatbelt) that can be made to fit there, if you don't want a passthru. Or minivan jump seats from Odyssey's or Sienna's work well, too; but are pretty narrow.
I have the center seat from the Odyssey in my ambo at the moment. It is great with a clipped in childs seat but it does not have seat belts suitable for booster use. But now the grand daughter is getting into booster seats there is the F550 jump seat in the garage waiting to go in. The Odyssey seat was installed using the existing latch system so that getting the dogbox out was just as easy and it provides a couple of cup holders when not being sat in. The F550 jump seat will be bolted in place (with load plates under the floor). Removing the dogbox will be more of a challenge. The center console fits with both but the seats are unusable with it in there.
Neither leave much room in the front and using the pass through is very difficult. But I found with all the vans I have had that 99% of the time I hopped out of the vehicle and reentered by the side door anyway. for me as long as there is emergency access through from back to front I am happy.
So give me a couple of months (baja and expo this month) there will be a click in center seat and mounts (no seat belts) for sale.
One other difference between the pre 96 post 96 vans is the later ones have the explosive pre tensioner on the seat belts. Makes swapping seats a bit more of a PITA but IMHO the later dash is worth the seat pain.