Hi Im new How do I find out if I have a Carter or Hitachi carb. and will they interchange with a Webber ?

From what I understand of the Carter carb is it’s a single barrel carb and the hitachi is a dual barrel carb. 

Either one will need an adaptor plate for the Weber carb. Many threads on this to read up on. 

Cheers 

Bennie

Commonly available adapters for the Weber do not fit the intake manifold of the Carter. There is essentially nothing for the Carter and if equipped it would easier to swap to a Hitachi manifold. 

I can't recall seeing any Carter equipped EA81's after 1982. Anything is possible though and of course engines/carbs get swapped on 40 year old cars. 

GD