Meep & Lew maybe you can help me a little here. Trying to help a friend with his 440+6. First a little history. 440 .060, 10.7 cr, auto trans. comp cam 540 lift 236 @ .050 dur. 110 lsa 10 inches of vaccum @ 800 RPM. Center carb has .118 holes in blades. 12 degrees timing base mech advance distributor. 2 problems we were trying to correct, rich idle & a near stall stumble when lifting off throttle at stop lights. I went through and set the outboard carbs so butterflys were closed. Long story short to get the idle close I had 1.75 turns on the idle screws on the center carb and outboards closed. I'm thinking that the outboards need some holes in the blades so I can use the idle screws on the outboards. We started with one turn out on the out boards but ended up having to screw them in to get the idle closer. I did use the blocking the bleeds on the out boards to determine this. I think we are going to pull them off so I can go through and verify where everything is. Also I'm thinking a power valve of 5 -5.5? I'm helping him so I can learn and then tune mine when it's done. Thanks in advance!