The left side of the dash in my 91 Camaro RS dosnt work (speedo, gas gauge, and oil pruser gauge) but the right side dose, the car was a 305 auto with 10 bolt but had a swap and now is a 350 carbed, t-5 5 speed, 9 bolt limited slip. Anybody have ideas what might be causeing this problem?

Sounds like a bad ground... On the Firebirds (I know you have a Camaro, it should be similar for 90+) when you push the IP into place it plugs into the dash for power. Personally that is where I would start, by looking at that. The Oil Pressure, Speedo and gas should be independent of each other... Fortunately it is not like the new cars that only have one wire going to the IP and you have a digital signal from the PCM...

I am not entirely sure, but that is where I would start.

John