I just bought a 99 c5 that has catback, gutted cats and intake. I'm throwing it on the dyno tomorrow to get a baseline and do a little tuning before I start modding. I'm used to tuning my 402 Firebird and turbo truck so I'm not sure what you can really do with something that is stock. Should I just work on AF and timing a little or is there anything else that helps? I'm sure the gains won't be much but I'm thinking these things run pretty rich from the factory. Thanks