Z28Camaro83

I have a 1983 Z28 Camaro with the Crossfire Injection and the 700r4 auto trans. that i recently put a 350 into. I know I require the bigger corvette injectors to push the fuel I need. I was just wondering if I should purchase a chip for what i have now or go ahead and switch out the ECM with the 1984 Vette ECM since the motor I have now is basically the motor and injection system off of the 1984 Corvette. Where could i get a chip to fit my application? Would the chip be better than the new ECM? I'm just unfamiliar with all of this stuff, seeing as how I am 19 years old and this is my first project car. I have to start somewhere right? Any help is greatly appreciated!!!