[90FormulaWS6]

it sounds like your car is running really lean and you need to get larger injectors if your running the stock 305 injectors, along with possibly making your fuel pressure regulator adjustable... also with a cam (which im assuming you dont know the specs of) you will need a tune to make the car run right... the stock ECM will absolutely not handle the cam and demands that the new engine needs... as for anything else... you have to tackle one thing at a time so you first need to address the fuel issue before diagnosing anything else