Thank you for your suggestion Dolomite.
Datzenmike, Could you advise me where is the return pipe from carburettor? I really don't know where is it.
below is mine carb setup on Datsun A15 in ford Anglia engine bay.
Hi guy! I'm just replaced old carburettor with Hitachi SU carburettor. but I don't know Where does this breath hose connect...? and the pipe for fuel return too. Thank you!