head gaskets

I've been having good results with Mr. Gasket 5805G head gaskets.

Summit - source & info:

http://www.summitracing.com/parts/mrg-5805g/overview/make/dodge

They also have their MLS line - Mr. Gasket 3210G

http://www.summitracing.com/parts/mrg-3210g/overview/make/dodge

This particular gasket has a 4.06" bore compared to the bigger 4.140" bore of the 5805G and other gaskets. It would fit the 318 bore better and reduces the chamber "dead space" between the block & head, as well as helps compression a tiny bit. But it's my understanding that the MLS gaskets require a smoother deck and head finish. Engine builders please correct me if I'm wrong.