i have recently taken out my 305 engine from my 91' camaro RS and purchased a crate engine 350 (330hp) and im planning to get new headers and a new exhaust (going towards a borla) but besides those modifications what else should i do ? btw the engine is carberuated or however the hell you say that. Also im only 13 so uhhh if some of this info is wrong plz tell me

thanks for the help
forgot something, what kind of seats should i get because me and my dad want something like race seats but comfortable and with some sort of lumbar support. plus we have to get it covered with a new fabric.