bought a mystery 850 double pumper...

there were 3 annular carbs, 9379, 9380 and 9381
the 9381 is the 830cfm carb
based on the secondary linkage i bet that carb is a 9380, 850cfm, whats the number stamped on the throttle plates? looks like 1.75" plates to me...

also might wanna check all the bleeds in the carb, looks like it might be missing some idle bleeds.