Camaro engine trouble

i have a 1991 camaro 3.1 the engine will run fine for about 5 minutes and then will start running rough. then i have to take the spark plugs out and clean them and then put them back in and then it runs fine. and then repeat… iv been told its got a blown head gasket or a blown intake manifold gasket how can i tell which one? i need to know fairly quickly if at all possible so i can fix it and get it back on the road any help would be greatly appreciated thanks

Why did you start a new thread? It is just confusing.

sorry i dont know why i did i guess i just did because i thought of more stuff to say lol