Along time ago I ran 190's with plugged spill ports, did the same thing, had a Lopey idle also. It bothered me, so I bought a matched combo from Elite, stage 2's and VGT-SSX, and it purred like a kitten. My old 190's were sent out to be rebuilt, and sold to Josh Haddox, with turbo, VGT-40. His truck seemed to do fine with them, not sure what was changed when they were rebuilt, but iirc correctly just cleaned and rebuilt the same. So my assumption was it depended on the individual truck. I believe Warren has figured out how to tune for the issues now, might give him a shot. After my Elite combo, Tadds tunes ran way better than any other in mine.