I bought some of the thin white MP style gaskets from Summit just last month. Mr Gasket still makes the thin ones, .026" compressed, IIRC. They are the sticky coated-graphite ones that used to be orange back a few years. Have run them on 318s-340s, .060"over with zero problems. Over 11.5:1 I would run a MLS (Cometic-type) or a TITAN ICS gasket I think...RB