Okay guys I have a 1994 caprice 9c1 with the lt1. It has tri y headers and true dual exhaust, cats delete, and that's about it. But at what point should I get it tuned? I'm planning on getting a RAISS intake here soon too. So let's say I go with a mail in place like pcmforless or pcm performance, how do they know what to tune my pcm for? Like is there info I give them which helps them to fine tune it to my mods or what? Thanks ahead of time for any help/responses.