Hi, Can anyone tell me if the 1900’s CIH from the B Ascona fits into the GT ? Should normally be the same as in the GT or ?? How do I recognize whether it is a lead-free head ? The engine is in a good condition with little KM and I would like to build it because it is equipped with a sharper cam and Solex Dooppel carburetors . These are exactly the same components which (allegedly) were used earlier in the races. thank you Sven