-I have checked the tanking venting. My shop has dirt dobber nests everywhere so I thought one may have found a new home but I was good.
-The Brawler comes with a 120 needle and seat.
-I am running 93 unleaded and last night was my first run with 90 pure gas (no ethanol) and just a touch of Boostane (2oz to 7 gallons)

Last night
1st pass - jetting 76/84 6.5 lbs fuel pressure 1/8 mile 7.378/93.65 1/4 11.596/116.11
2nd pass - jetting 76/84 5.5 lbs fuel pressure 1/8 mile 7.378/93.38 1/4 11.608/115.86
3rd pass - jetting 82/90 5.5 lbs fuel pressure 1/8 mile 7.43/93.12 1/4 11.679/115.27

I was actually thinking about my scoop set up last night and curious if somehow I was restricting air somehow. I have my carb sealed to the scoop using two pie pans. It worked really well with my 451 but I was using a dominator. I made a new pan for the 4150 and maybe I have inadvertently covered or restricted the air bleeds.