I don't see how switching to a vintage mechanical carb is going to improve anything. It would probably be worse with no accelerator pump, and a big round slug for a slide.
There is a reason why modern carbs have moved to flat slides like the Keihin FCR and Mikuni TM carbs. They also have accelerator pumps which helps with throttle response.
2003 Limited Edition Raptor
Kenz 720cc 11:1 stroker, +1 valves, Mega Cycle X-4 Cam, Sparks 6x Big Core, Keihin 35mm FCR's. 158 mains, 52 pilots, fuel screws 2 turns out.
F.A.S.T. Dune Ported 4mill, CPI Inframes, Keihin PWK33's, Direct Drive Lockup. 158 mians, CEL needles second clip, #48 pilots, air scews 2.0 turns out.