Head gasket recommendations for magnum

Block has been decked and has .020 over flat top pistons, no valve reliefs, Cam is a .490/490 lift with 108 lob separation. I bought the short block part from a guy that was gonna build it up but he never got around to it, never said how much it was decked. Heads were rebuilt from a shop that i believe they surfaced the head, cant remember. Do remember It was somewhat of a rush build since i was wanting to drive my car to minnesota at the time and the cam supplier recommended this cam so put it together and ran great untill now.


I can't believe you are anywhere near close on valve clearance with that cam. Even without reliefs.

Do the clay method and check it with the springs you run in place.

Edit: if you do need the .050 gasket there is a Fel Pro gasket that will be just fine. I can't remember the part number but someone here will have it for you.

Also, you need to figure out why the head gasket failed. You are detonating it, the surface finish wasn't correct or something.