what all do I kneed besides a cluster and the pig-tail plug to go from a non tach cluster to a tach cluster on my 95 ram 1500 rcsb 5-speed?

 

Pigtail is the same. One wire is different. (tach feed.) Your truck *may* already have it, and all ya gotta do is swap the cluster. Then again, it may not, and you would need to run it. Grab the service manual for your truck from here. Check out the wiring diagram for the cluster.

 

My '95 didn't have the wire. It was a very base model 1995 Ram 2500 360/5spd 4x4 RCLB. If you can get your hands on a cluster just plug it in and try it.