AFR readings

Pvr maybe, just look at how the front is setup from the rear or "4 brl"

Are you switching to a 2brl from a 4 brl , because its worded like you unhooked the secondary and throttle lever. Lol

Carb is a Proform 850 with no power valves. Ran same carb, just unhooked/removed the rod for the secondary and ran the carb on the front 2 bbls.