Super 6 conversion

Hey guys I was just wondering if changing the stock single barrel to a super six was a good idea.Does it help a /6 a lot or somewhat.If I done this I know the intake,linkage and kick down has to be changed but what about the Exaust manifold,will the stock work or will it have to be changed as well.Also what am I looking at price wise if I decide to do this,I have the 2bbl carb and air cleaner but nothing else.Thanks