V6 Valve shims?

["Jeff Greenfield" <alfaguy@xxxxxxxxxx>]

Theoretically the same valve shims can be used on 4 and six cylinder cars as
dimensionally they are the same.

However, according to Alfa, the V6 shims are hardened (as identified by a
groove in the outer circumference), there is no problem using the V6 shims
in the 4 cylinder engines, however (supposedly) using the 4 cylinder shims
in the six cylinder engine is a big no-no.

Just curious what everyone does here? Anyone have any first hand knowledge
of valve shim failures?

Thanks,

Jeff
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