mac, i know hauck sells 780 head gaskets.....don't know if they are actually made by cometic for them tho. maybe call and find out??
lhviper, i used the stock viper head gasket. i had set up my buddies domes to run the stock head gasket....meaning squish clearance and trapped volume, etc, would all be what we wanted in the end, w/stock viper head gasket. i don't know for sure what your domes are set up to be.
also, i never tried reusing the head gasket. i hear of people having luck do it. i just bucked up the extra $30 or whatever and put a new one on. i'm kinda picky when it comes to that stuff i guess.