vacuum line into manifold for booster?

[jimmybeus]

Howdy all. I was at a car show today and noticed a few of the cars and trucks had the vacuum lines from the brake booster ran directly into the port on the back of the manifold instead of the carb. Would this give better brakes or be beneficial in some way? I am wondering this because at idle and lower rpms my brakes are stiff and require some effort to work, but at higher rpms they work like they should. I know that the more aggressive the cam is the the less vacuum there will be. Any thoughts? Thanks.