Just went to a sheetmetal intake and two 9377's modified by Nickerson Performance, (bought these used), idle is good with the idle mix screws out 3 1/2 turns. This seemed like a little more that I'm used to. Runs good WOT with egt's all very close. The main problem is staging, we run a pro tree and when I transition from idle to wide open throttle the engine will die. If I run a sportsman tree where I can take a little longer bringing the RPM up its fine. The 50cc pumps are adjusted at .010-.015 from bottom, the squirters are #35. The carbs are supposed to flow 1250cfm. This is on a 700 inch motor. The mechanical linkage that I run definately opens the throttle blades quickly whitch adds to the problem. When the car dies it will start up easily and does not blow a bunch of black smoke, so I'm assuming its just going lean. Any thoughts?