i have a 1990 lx 5.0 the only performance adjustments i have made is a 2 and 1/2 exhaust system. I want to put a 4:10 gear a shift kit a kam and some ported heads. I also want to put on a gt-40 intake and a bigger throttle body...what are some opinions. it is an automatic and i am still in high school on a lower budget. I work with a mechanic so labor costs are not a problem. Which of these mods would be the best to do first.