I have a 1978 chevy k20 with the 350. I just put a melling ccs-2 camshaft into it. Duration at 050 inch Lift:194 int./202 exh. Anyway when the engine is first started and warming up the throttle response is great. Once its warmed up and in closed loop it stumbles when I give it gas. If im slow on the throttle I can get it to rev up but if I press the throttle with any speed it bogs and stumbles. I assume this is because it need more fuel. When idling hot the INT is 128 but the BLM is 155. Right now it has a bone stock AFBW bin with only the egr turned off. What can I initially change so the engine runs better so I can start getting it on the road for tuning. Right now it barely moves when in gear when giving it gas.