It's fairly time consuming but not difficult to pull the whole dash off. If you can find a donor I would take the dash off that first and see what all routes air to those vents. You're going to need the pad and the dash face, plus whatever passages run between vents and heater box. I think the pad itself can come out of most any 85-up but that panel, bezel, around the cluster is 93-95 only.
I was reading my owner's manual the other day and the heat control doesn't have a "vent" position to direct air out of those vents, so you may want to grab that as well.
I don't recall ever seeing one without the vents. Even my stripper work van was ordered with front and rear A/C (but oddly not rear heat). I want to say my first one, a 95 work van, had A/C too but I don't remember.
If you do eBay grab the cluster from your donor, you can sell it to offset your costs.
If you can't find one, I do have an extra grey dash pad with a couple holes in it and some other stuff - but I'm in New York so the shipping will probably cost a fortune. There's one out to my local yard right now, too, tan dash with no issues. Would be easy to paint.
Last edited by pontiac59; May 31st 2021 6:44 pm.