Anything is possible. Some things just cost more.
How did you want to mount them?
If you can find a 91-93 Police instrument cluster bezel you can use an instrument cluster out of a 91-93 9c1, a 91-92 Olds Custom Cruiser or a 92-93 Buick Roadmaster. All three of these clusters have a tach, volts, oil pressure and fuel level. The 9c1 cluster has a digital speedo, the other two are analog. Several people have posted pictures in the past. There is some wiring to do, but a quick search should tell you all about that part. Be sure to get connectors out of the donor car!
Pillar pods are still out there in black IIRC. Then you just follow the instructions that come with the guages. I used Autometer for vacuum, fuel pressure and trans temp.
There are also three guage clusters that have the common idiot light functions at the local parts stores too.
But to add aftermarket guages, you might have to mount a sender and you'll definitely have to run some wires, but it isn't hard.