Ok.... High CO indicates a rich condition. Possible culprits: air filter, oil in need of changing, stale fuel.

High HC indicates a misfire, so plugs, wires, anything that could make the engine miss under load.

Replace the air filter, check the plug wires, distributor cap and rotor(if applicable), change the oil.

You may want to dump a couple of gallons of E85 in the tank and fill it with fresh gas, premium is not necessary or particularly beneficial. Make sure there's no exhaust leaks, particularly upstream from the O2 sensor.