What Is To Ring A Cylinder Head???

blower or nitros,,,on a small block mopar require O-RINGING,,, i have an groove cut in the deck for an 043 wire,,and i also use the felpro permatorque head gasket,, it has a ring around the cylinder built in to the gasket also,,

some shope will do a groove on both the head and block as a reciever groove for more positive sealing,, a standard production 340 still may have head gasket problems being O-RINGED if you have to much boost,,the race blocks or the earlier version called the " X " blocks are more stable and thicker decking to leson this problem,,,,, i have an " x " block,,superecharged