What size carb should I use?

I am rebuilding my Rally 200 and was looking for the best advice on parts. The top end kit is obviously going to be a Malosi 210 with a full circle crank for reed induction. Here is what I have so far:

Mikuni Carb 28-32 (not sure what size to use and does it come with the cable / choke cable conversion?)
Intake setup for reed valves (What degree angle should I use?)
8 Flap Reed Valve setup (Do I need a reed stop for this reed kit?, it is not shown in the picture.)
Transmission kit with the T5 4th gear (not sure what part number it is)
Will I need a different gearbox selector with this transmission?

Any suggestions or advice would be appreciated.