302ho Help

[1989 lx]

Hey guys my brother has been in service for 2 years. this christmas i was lucky enough to get his mustang a 300$ credit to pick and pull from my uncle the good things on the car is jba equal headers dumped exhaust & and full msd ignition set up so now im trying to put some heads in, i have 500$ that ive been saving from my afterschool job and the 300$ credit to pick and pull and my brothers friend says he can give me a e30e cam if i plan to change the heads. so ive been doin a lot of research on gt40/p combos and dont know whats the best i have to keep it street legal so im able to get to school and smog. so please if u can help shoot me some suggestions..