Intake Manifold Gasket ?

Your parts guy must have stock in Edelbrock. Use Fel-Pro.

Looks like your in Cal, so with the mild temps in the winter,and hot temps in the summer,I would suggest getting a gasket that blocks off the heat crossover.
Fel-Pro 1213 is the gasket I use. Don't use the end seals, instead use a healthy bead of RTV on them.

The key will be on the instalation and technique. When you get to that point ask more question. It will be the difference between doing it once or three times.