Perry,
I've been using side pipe hookups for years. I read an article in Hotrod magazine about this and tried it. I connected one breather from a rocker cover to the PCV valve and the other to the hoses running down to the sidepipes. It was too much trouble to run the hose to the sidepipe collector, so I just choose the handiest pipe on top of the bundle and marked a spot about three inches inside of the car body. I had to remove the side pipes. Then, I drilled a 3/8th hole through the mark and brazed a 1/2 inch tube over the hole on each sidepipe. The tube that comes with the Moroso kit is threaded and a one-way valve screws onto the end of it. I believe that it is a special high temperature smog hose (with three ribs) that pushes over the valve nipple and the other end goes to your rocker cover. I use a plastic "T" fitting at the breather cap so both hoses connect to the same side.
I do believe that the vacuum helps seal the rings and gives more power. In a dozen or so years, the only trouble I have had was once, when I over-revved the engine and broke a piston ring. The
oil blowby was so bad that cars behind me complained of the smell. Since I rebuilt the engine, that is no longer a problem.
Paul