You can use the current manifold with weber style throtle bodies, but last time I checked these cost minimum of $400 each and you need 2! Get an 18rg manifold to start with, I sold one a year or so back for $150. Look around you should be able to get one for under $200. That would be your first step find that and your %70 there. By the way I don't mind answer your questions at all so fire as many as you like it puts my add back on top.