Ok all, I have a 500" stroker I just finished up this spring that has edelbrock RPM heads and intake, 10.6:1 compression, and a quick fuel SQ-850 mechanical secondary carb on it. The carb comes with 70 IAB from factory and a 4.5 PV. I am all square on the transition slots so it shouldn't be pulling fuel from there. I called holley and they told me not to mess with the IAB jets in the carb and just to use the Idle screw to adjust. This seemed a bit odd to me but whatever. They also said that maybe I should go down a couple sizes on the PV to ensure it isn't dragging fuel in from that circuit. I have about 9-9.5 in/mg of vacuum at idle so I was thinking my PV at 4.5 was ok but? I am having issues getting this thing to idle and not be pig rich. I am out on the idle screw 3/4 out from fully closed. If I lean it out any more, it idles and starts hard like its getting towards the lean side. Any other tricks to use before I say screw it and just run it as it. My timing is at 28 initial and 34 total as well so it has plenty of timing at idle I would say. I was thinking of maybe going to a 72 or 73 IAB and trying to calm down the idle circuit that way. HEMI-ITIS, LEWTOT, a few others hope to see you chime in with some ideas. I am fair proficient with the Holley's, but this is getting the best of me. Thanks in advance.