Head Gasket .60 overbore
If you give me a few days I have a big bore gasket that the slant racers back east did a group buy. I can get you the part# and bore size. I just gotta remember where the heck it is.
I also was told by Russ of Indy Cylinder Heads that Cometic can make just about anything you want. Worth a call to Cometic.....Just a thought.