normally i run enderele bird catchers on all my motors. i wanted to have the tall scoop to get catch air above the roll cage on the dragster. I've ran the toilets before on my old 68 camaro super gas car. Never had any problems with that system either.
I took the check valve out of the barrel when i put the higher psi poppet inline.
and yes the fuels all the way on. as far i know the egts are way high at idle during that situation. Which normally indicated its lean. The way the motor acted it was lean. Hesitation, lean backfiring, water temp gaining too quickly, etc. All my other systems idle temp egt temp would be in the 550-650 range. my high egt after a run would be 1120-1200 on this motor when it did run a clean pass. My 540 liked it about 1000-1100.
One other issue i forgot to mention was it seemed like the first pass of every day, the motor wouldn't get up the converter no matter what the tune up. It would rev to the 3500-3800 and stay there while on the brake. Carried it out to see what it would do once and after it cleaned out (100 ft-120ft out) it took off and ran fine. Lean it out one pill size and it would be fine for the next run. Then the next pass it would want the original pill back it in. It would be fine the rest of the night. Theres time i would be changin pills 4-5 times a day between 3 pill sizes (110, 112, 116)