Not sure how making judgements is helping with the OP's question. I don't agree with what he's doing, but if I couldn't help, I'd save the two minutes spent posting on getting some more grinding done on my own bike. Seems more productive to at least one of the parties involved.
Yo OP, are you going to have somebody with experience tune your carbs? If so, they should be able to get almost any slide carb to work fine.
1. Get the bike running good with the STOCK setup first! Believe me, this will save you a lot of trouble because it will eliminate or identify the carburetors as an issue. Once the bike is running just right, then you can bugger up the carbs and you'll know what you've buggered up.
2. Don't start out with a four-cylinder. Any bike with uneven variables for the cylinders makes for trouble in tuning direct intakes. Start with any twin, that way the cylinders have equal conditions.
3. The best bike would be one that comes with slide-carbs or that you will install slide-carbs onto. People believe there is some mystic force that does not allow the two elements that are CV's and Pods to combine in our psychomonelecular plane. The fact is that pods are really no good for CV's because they don't allow smooth or conditioned air that CV's depend on to raise the slide smoothly. Even though you can tune it, it's a pain and doesn't allow the carb to work as it was intended.
4. You're new to this. If you buy anything listed as a "project" or "mechanic's special", you'll end up selling it as "buggered" or "turd". Get something that runs before you raise the forks through the trees and install a bitching boat paddle for a seat.
