my 2 cents . You have quite a cam in a sort of small motor . With overlap it will be awkward .
T slot jet is too small .T slot and iab work in conjunction , increase or decrease together What size idle feed restrictor as this will affect idle and off idle . What powervalve ?
A long time ago a smart man told me - dont fixate on the afr number give it what it wants .
Example my cruise , 25/2900 is 13.4 any leaner and it surges .Peak hp is at 12.9
granted i run a 1050 now but all holley are same principal . When i used the 1000HP on my 505 i had to adjust the same to get it to run as good as it had on the 440 .

Tex