I agree with david you need larger nozzles, i would suggest 36's, i also runa 4.1 toilet with #36's in my 377" chevy, i also donot run a rons pump. Actually i started my leakdown at 25% and backed down to 18% for good response. I wouldn't worry too much about the idle egt temp. you can run an idle bypass and stop the milking. I don't run an idle bypas i just shut the fuel 1/2 way down to warm the engine and open it when i get ready to run, looking for about 1200/1300 on top end.
JMO
Zip.