If you have a post 98 you need the cluster from a post 98...Everything will work. I have a V6 cluster in my Tour and it works great. The only thing is the V6 tach will not read right on the Zetecs, but if it's just for show thats fine.
Hector had a full SVT V6 cluster in his tour, but recently swapped out just the tach for a Zetec one he found at the junkyard, hence he's making a weak attempt at busting my balls about it
I ordered my cluster from
http://www.car-parts.com for $45.00 shipped if that helps at all.
just get the cluster and make sure it's from a post 98 if thats what you have, once you get it, we'll make sure you get it in and working.
