Intake manifold gasket

[79blazer]

I installed an edelbrock intake manifold 4 months ago and for some reason it was leaking. I discovered the bolts loosened up somehow. It was parked for a month and now some of the spark plug may be fowled up, it missing. I bought some 12 point bolts so I can tighten un the hard to reach ones and I think i am going to use a little threadlock this time. I heard you can't use stock gaskets, is this true? What kind do you get? And yes i used black rtv on the ends Thank you