Quote:
f they are not GX carbs what are they
The carbs look like 610 SSS type.
But the manifold is an A12GX manifold. The carbs do not match this manifold.
The B210 GX cars had a twin-carb engine officially referred to as the A12T engine (1973-1974) or the A14T engine (1975-). So most likely these are GX carbs -- from B210 GX car. But they could be from 610 SSS or other Datsun model.
The flat-top Hitachis have anti-pollution changes to them, compared to the dome-tops.