need help...what mods to buy????

after doing my taxes....we had to get the kids new beds(the little turkey destroyed 2 of their 3 beds).....and we also decided to get new couch and sofa( again they ruined a futon couch we had)....i have to get some dental work done...after figuring i only have $1000 to play with...i'm already getting new headlights and a smog pump delete....i was wanting new heads, but that would be all my money or more ....i am thinking of using my stock gt40 iron heads, but putting an f303 cam in it.....how much hp would that give me....what other mods should i do....i'm thinking of a 75mm throttle body, headers, pro 5.0 short throw shifter....any other ideas?????

what about a performance chip??? what kinds are there and ruffly whats the price i'm looking at???