273 commando Build

ok A few hours ago I did a compression check most cylinders were 150-160 # 2 cyl had 50# dead cyl. so took valve cover off check valve gear looks all fine . bumped engine over.... looked thru the drain back areas in the head seen the head gasket pertruding out Buldging .. when cranking engine it will blow compression out where head meets block with antifreeze seeping out also . both # 2 and #4 cyls are popped ...... under the valve covers looks like a milkshake.