DIESE ÄNDERUNG DER STÖßELBECHER WURDE SO NICHT VERBAUT. DER ALFA HAT NORMALE SERIENTEILE.
The new cam with smaller base circle requires a different valve clearence compensation at least on the intake side. The exhaust valves I use have 1 mm longer stems. Here adjusting the correct lash (0.45 mm) with normal Alfa shims is no problem.
J. Kartalamakis recommends to use regrounded Volkswagen Golf Shims (see next photo) or special custom made steel shims. Higher shims than 3.50 mm are reported to be available at Gozzoli in Italy .
In my special case I would need modified shims from 4.85 mm to 5.35 mm thickness.
My solution to that problem are modified tappets with a thicker bottom, see post above. 
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