"Holy old thread resurrection Batman..."
If you still want to do this, here's how.
I saw a post on FTE vans sub-forum asking about cluster swaps on up to '96 vans. Forgot that I did this project following an old truck forum thread. Anyhow, it can be done using an F-250/350 gas engine cluster from the same era (92-96) vehicle, then swapping pins in the harness at the back of the cluster.
Read away, but be sure to read to the end before tackling it. (I'm 95CWChateau on FTE).
Finally Done, Cluster Swap w/Tach