I got a camero that had a 350 TBI I got the car with the motor removed. I installed a 305 that I had laying around. My question is what will I have to change to make this run right with my 305. I stil have all the 350 TBI parts. The injector plugs are orange.

All I am guessing is that you will need a 305 Knock Sensor.

then again, I don't know squat.

Pet peeve #1: It's Camaro

Why would you backslide and lose displacement? Thats silly. What's wrong with the 350 you have now?

I bought the car with no motor in it. I have a 305 laying around. I Will be putting a 350 in it later. Its not hard to change motors IMO. BUt I dont want the 305 running rich cause the computer thinks its a 350. I did a little research and found that all aftermarket Fuel injectors are the same. Sooo I think I will be able to use those no problems. I do think I will have to get a 305 computer. I think ?

You will need a 305 knock sensor, 305 PROM/chip, 305 injectors, and 305 ESC module.

Correct.