yes the computer uses the info from the 02's to tell how much fuel to send through the injectors. you can get 02 bungs to have welded in if the headers dont have them. first 02's go in the headers. here is a place that can tune your computer. LT1 PCM Tuning - OBDI/OBDII PCM Tuning/Programming Service

 

anything else you'd recommend me having him tune before i send it in and realize i should've had him change something else?

On another note, I just took off my intake baffler, and replaced it with a 3inch rubber coupler. With a few clamps it sits on there just fine (:


Also, Is this hole a big problem?
If so, how do i fix it


No more baffler, looks a ton better imo, just a 6 dollar temporary thing until i have the money to do my intake


here is what I'm working with btw