/6 head

They still use steel head gaskets on newer engines. Granted they are multi layered steel(MLS), but they are not composite. The Chrysler 2.2/2.5 and 2.0/2.4 had many head gasket leak issues with composite gaskets and that was regardless of sealing surface condition. In 1999/2000 chrysler came out with the MLS head gasket for the 2.0/2.4 and when installing them on an engine that came with a composite from the factory you don't have to machine either block or head just make sure they are flat and clean.

I haven't seen any recent production engines that used a composite head gasket everyone seems to use MLS. I would use steel if you can find one.