Mk1 1.8 Clipper/Convertible inlet/carburettor Manifold help needed

Hi,

Could any of you 1.8 EX engine clipper cabrio owners please tell me the part number for the inlet/carburettor manifold?

Also are all carburettor Mk1 and Mk2  1.5, 1.6 and 1.8 inlet manifolds the same and interchangeable?

Thanks in advance for your advice.