you got one of those really GOOD deals! Great bike.
As far as the carbs, once you do it a time or 2 it will get real easy. You may or may not have to loosen one or both of the rubber boots to wiggle them in or out. I think I did it with the boots (carb holders) in place....but maybe not. The boots are not hard to remove anyway, so.....there you go - just unhook throttle cable and fuel line and air boxes, and wiggle 'em on out.