[JL8Jeff]

Being lean can also lead to the random misfire code. Almost seems like you might have a vacuum leak somewhere. Lean can also lead to converter failure from too hot of an exhaust. Search Ebay for some AC Delco O2 sensors or just swap your rear O2's to the front. The rear O2's only check to show if the convertor are working properly. But be careful trying to remove the O2 sensors, if they are rusted in place and you have to hit them with a wrench to break them loose, they can be damaged. I would just get new O2 sensors for the front. Check your intake elbow for any possible tears or leaks, also check the pcv hose and the brake booster hose. The last possible place is the EVAP hose and solenoid that pull in the gas tank vapors. I swapped all that stuff out on my old 96 SS and the code still came back 3-5 months later. 96's are known for the P0300 problem when there really isn't anything wrong. I'll look for the ICM but you can try the coil if you want.