Nitrous vs head gaskets

so i'm purchasing a 340 right now that consists of
302/309 duration .654/.655 lift solid roller
x heads ported with stainless ferrara valves
forged rods and crank
customs ross pistons 11.7-1 compression
super victor intake
berry grant 750 cfm carb

now my question is when it was ran on nitrous it kept blowing head gaskets.
is there any way to help with this issue or something possibly doing wrong.
it was hesitating just a hair when we put nitrous to it and popping a little at high rpm
and then the next try it blew