Junkyard 5.9L Magnum + Edelbrock LA heads build

There is the Mr Gasket 1121G at .028" thick. Not sure how it will hold under boost.... some have noted them not holding as well.... I dunno all the circumstances in their application in those cases however, like: were the decks and head surfaces true, and were the head bolts re-torqued after a few heat cycles?

I've used similar composition gaskets to the 1121G's in my 2.6L Mitsu with 14-15 psi boost for rally use and not had any issues ever...... I take that back: 1 did fail once in a rally, but the head had warped a bit.

Putting a thin coat of KopperKote on would not be a bad idea IHMO.