Here's my take on the "no end gasket" suggestion from Edelbrock. From their point of view they may very well be correct because I'd bet that most of their aluminum manifolds get put on "milled head" engines that have poor fitting manifolds due to the heads.

As Kurt stated, you only get one chance to set it on straight without knocking a gasket or sealer off. The "trick" is to use two people and have some "hand holds". The vise grips in the center of the top lip by the valve cover rail make for a good handle balance point. Leave the hose clamps off the bypass hose to give yourself a little more wiggle room.

In my youth (note, many years ago, LOL) I would crawl into a Ford truck engine compartment, feet on the frame rails, and grab the cast iron manifold sitting on the inner fender and stab it on the engine. Everyone was busting their butt to earn a living on flat rate in the 1960's. I also did one head R&R's without pulling the intake manifold. Aww, the days of warranty flat rate.