Aluminum heads and steel shim gaskets ?

I drive now 2500 km with aluminium heads and the Steelshim gasket without any problems.
I just sprayed the "Spray a gasket" Kopper on it.

We used to run the .019 steel shim gasket on the hemi, w/ Chrysler red spray can sealer on both sides,'very sticky". But the hemi had more bolts around the cyl head and better spaced, than most engines.