I ordered HMF full system, K&N. Will be here this week I am going with HMF jetting specs 150/155. Then it says put need on 3rd clip pos. and air/fuel screw 2 1/2 to 3 turns out. Any helpful hints on doing this, and does it sound about right I live in Michigan Mid-State.

 

Personally I would never run with the air screw 3 turns out. Most are designed to only thread 4 complete turns so your running the risk of it falling out quite easily. It's a good rule of thumb that 3-4 turns on the air screw is equal to one size on the pilot. If you need to have the screw out that far, maybe you should think about changing the pilot.
Just a thought

Shavo