I want to put some different injectors in it but dont have the slightest clue on what to buy. Is it recommended I buy anything else? What kind do I buy if i want some performance ones? Please help me.

 

Stock 3.4 ones are 16# or 17#, I've heard both depending on who you talk to. Those should really be okay until you do cam/heads or a power adder. I bought some used 3.8 injectors, they're 19# and should compliment the engine work I have planned.

If you want to add a bit more fuel without changing out the injectors, get an adjustable fuel pressure regulator. Holley makes a really nice one that fits 3.4 and older TPI motors.

 

No such thing as performance injectors considering they will not add any power. They only become beneficial once you start playing with the motor and bumping up the power levels, as mentioned above. Have you done any other mods. to your car? If not, I would consider saving that money towards a cold air intake and some exhaust work.