I found the problem, the fire-rings were hanging over the bore, every fire-ring on every cylinder was cracked in half, they were all gonna go at any minute. I put some new gaskets on there (the fire-rings fit nicely), followed the correct sequence & first torqued them to 30 ft lbs then 65 (which is what my chevy book recommends.) Thanks for the help! Ill post pics of the bad gaskets as soon as I can find my card reader.