skyler,
if you blew a head gasket, then your probably detonating. Take a look at the plugs just to see what they are looking like. My best guess is that your either running too much timing w/ the nitrous or not enough fuel, or both.
If your going for a good nitrous cam, why give ed curtis a call to see what he can do for you.
http://www.flowtechinduction.com/ I believe he will custom grind a cam to your needs.
If your willing to spend $350 you could get the heads a little ported and possibly get the lower intake match ported at a local machine shop. In my opinion there is nothing wrong w/ having a machine shop do some mild porting on heads and matching everything up. Now when you get the heads race ported, or fully ported you really need a good flow bench to make sure the #'s are where they need to be..
just my opinon
good luck
Dan
95 rio red cobra #2021