Rubber w steel B/RB valve cover gaskets?

[b5blue]

  I swapped out Sidewinder aluminum heads a few years ago and last week I pulled off one of my Cal Custom finned valve covers. The black compound gasket (Not cork type.) stuck to everything sort of. I'd used copper RTV gasket to cover and a light film of grease gasket to head to allow release but that did not happen.
  I just got a nice set of molded rubber gaskets with steel inserts to try out and wondering if any have used them also? I have a set of silicone gaskets but they are so floppy I can't see them staying put. 

[c00nhunterjoe]

I uses the rubber overmolded gaskets from moroso i beleive. Never had an issue.

[metallicareload99]

Are the heads milled on the valve cover rail? Moroso 93055 have worked very well on my Trick-Flow heads with cast valve covers. I have Cal Custom valve covers on my other 440, I'd think they'd work good, assuming the valve cover rail is milled

[b5blue]

Yes the rails are milled nicely. 

[flyinlow]

Overmolded Moroso have worked well for me.

[jefferwin]

I've never gotten anything but cork gaskets to seal.  Went through 3 sets of the narrower black ones, never could get them to not leak.  Use cork.