Honestly make a budget and a real plan on what you want.. I built a 12 second car 5 years ago that was stuck getting modded and barely into the 11's, so i finally sold the whole combo and went for big numbers....If i had it to do again though just for a low 12 high sec drivable car , I would go in this order... Off road H or X pipe, U/D pulleys, Gears, then shorty headers, Then go with Injectors and mass air, An intake, then heads N cam... Just an idea though. Like blackened said there are PLENTY of free mods... Oh and yes... If you do convert to Mass air try to find a donor car.. I bought the FRPP conversion kit and ended up ditching it for a harness...