Yes it is, but!
You could swap to a Level 2 VR/VS cluster by a straight swap, to get a tacho.
The swap to a Level 3 is a bit more.
You will need the following:
1) A level 3 cluster from a VR or VS. A VN or VP cluster will cause smoke.
2) The trip computer buttons.
3) A patch wiring harness to connect the trip computer buttons and the cluster fourth connector.
The most difficult task is sourcing a wiring harness to make the patch harness from. It is possible to buy a new harness for this, but cost is not cheap.
Many have done this mod. Most have got through without undue problems, though some have struggled.
It is important to get a V6 or V8 cluster as appropriate as it is not possible to set this through a calibration like later models. It is possible to modify the tacho to fix this, but easier to get it right from the start.