When they talk about plugging the lines its usually done at the pump end not the cylinder head. If you do a google search for AIS Plugs you'll find some vendors that make the plugs and sell the kits, also try E-bay. You remove the elbows with vice-grips and a slide-hammer. I've also heard of using spent .45 casings on the tube portion of the elbow. Have no personal knowledge of that though. I removed the vacuum line from the rear intake manifold and rubber capped(Autozone), removed the pump (rear leftside engine cover) the chrome lines to the cylinders, the Elbows and plugged them.