I have 2 bored, ported, piped single carb 62t case engines. 1 uses a Riva 48 and the other an XScream 46. Simple setup and easy to tune, I did prefer dual 46's on both though. I also have a non ported, piped full 62t with dual Full Spec 46's and it runs very well. I am a fan of the plain SBN 46...