Clean combustion chamber after AOS swap?

I recently experienced a total AOS failure during a canyon drive. When I saw the huge amount of instantaneous smoke I immediately pulled over, turned off the engine and towed the car home. I replaced the AOS, and during the job removed the plenum and throttle body to clean the oil that went into the intake to avoid further oil ingestion after the job. The car now runs smoke-free but is down on power, presumably because of fouled spark plugs, so I plan to swap those right away as well. My question is, do you suggest any other measures to clean out the combustion chamber and rid it of the oil that was ingested (any fuel additives, etc), or do I just drive the car? My concern is additional damage to catalysts, loss in power, etc. Thanks!