I used the Nostalgia Plus Hyd cam & it gives plenty of power for a cobra on the street. Not that a little extra would hurt
. If you are going with a single carb setup pick a cam that fits your needs. If you plan to go with webers at any point pick a cam for those. The Nostalgia plus sounds really nice with a single carb but not a "lot" of lope. Pulls pretty good in a gocart.