tunnel ram issues

Very good. Do not adjust the idle screws so "they are the same" physically. Adjust them so the engine RUNS. Not being familiar ( I THOUGHT there was a small interconnect or balance port on those ) you may have to 'rig' a vacuum gauge if necessary, to each one in turn. You should however be able to do this by ear and the tach.

Make sure you get the timing FIRST

Make sure the engine / carbs is fully warmed

You are / are not running power valves?