i have the 210/218 in my 5.3 ecsb and its a good midand upper rpm cam. I lost some lowend but not much(mainly below 2200rpms)

I would say atleast get a 2400-2600stall for it

as far as sound it will depend on how open your exhaust is. Its its open, then you can hear the cam good. If its a quiet muffler than you wont hear much lope at all.