I just changed out my blinky A/F ration gauge for one of Corbins. I am getting 1.1 and some times 1.3 at WOT. My current mods are:
> 95 RS
>10.5:1 pistons 20 over
>ealge rods
>1mm oversized ss valves
>crane #16 cams
>crane valve springs
>PT lifters/rockers


I am still running all stock fuel system. It blows out so black smoke at WOT and high revs. I am just in need of an S-AFC?

EDIT: i have a new O2 sensor so I don't think thats whats wrong.