Thanks everyone for the feedback; much appreciated! Originally I was going to build a blower motor hence the reason I have the Modman with the blower top. With money being tight now was just going to stick with naturally aspirated so I did get the single carb topper for the Modman and was going to put the 4150 to 4500 spacer on with a Dominator that I already have. I may just run it and see what it does then down the road put a 'better' single carb intake on and see how it compares?