Finally my new camshafts arrived from regrinding. CAMPRO did a good job to get the best benefit from the old Alfa 105480320051 cams. The new grinded base circle is 25,3 mm and they realized a maximum lift of 10,7 mm from the given cam profile.
Furthermore they did nitrating, straightening and polished the slide bearing areas. Clearance between the lobes and the head is ok.