B-block cylinder heads?

Alright, well like I first said I am not very smart on Chryslers B or RB blocks and their performance parts. I didnt know the difference between an MP and regulars ones so I apoligize for that confusion. I am a kid (not even fresh out of high school) but that doesnt mean I am a complete moron so I know that feeling about being talked down to.

Another thing is nitrous. Would I need to change the heads or anything for it?