You need a v8 cluster from a 93-96 camaro, you'll know it's a v8 version because the speedo will go to 150 (v6 gauge goes to 110 {120})
The back trace need to be cut in 2 spots and wires soldered in.
Small amount of trimming of the plastic dash support.
And a wire harness splice.
I have successfully done this to a 94 caprice and have been contemplating doing it to the 95 I have now.