So I have done my research and am about ready to finally do my swap but the only thing i havent found is what gasket to use..... I think there supposed to be reuseable but I really don't want to if i dont have to...

So thats it a simple question... Mark VIII gaskets or cobra gaskets...?

are you talking about the gaskets for the IMRC, if so I'm pretty sure they're the same

the cobra imrc gaskets are different depending on if you had the earlier aluminum imrcs or the later plastic imrcs.