Thank You very much for answer.
On the one hand i would like to try, but 13kg is not the world and additional when i take for example the old AFH engine like You said, i will loose 13kg, but i go then well knonw direction and also important for me is to keep the felicia gearbox - i avoid further problems by swapping and the felicia gearbox has many good parts available in czech for the motorsport.
Can You tell me how I can recognize the "old" AFH engine? Because i need the AFH head, so it wolud be the best to use the whole engine and change the internals from 1.6 16v.