The full specs had an external fuel pump but my 44's do not, they each have their stock configuaration pumps. However, on my ported motor those pumps supply ample fuel.
I just looked at some flow numbers and both full specs., novi maxiflows and RIVA power bombs look like great carbs. I am seriously considering getting a set of Full Spectrum's, the difference was that noticable. First I am going to dial in my 44's but even dialed in they will not hit as hard or feel as clean. Blowsion sells the full specs manifold and RAD valves but I think they only sell a single 49mm Full spec carb. They reccomend using the dual manifold with the RIVA power bomb carbs........probably b/c I don't think they stock Full spec carbs.