Make sure there are no cracks or problems with the manifold before buying it. You will need a new intake manifold gasket and two throttle body gaskets. You will need to use the 1g sensors with the TB, so make sure they all work as well.

Tony made a very good suggestion. 1g intake manifolds are great, but the problem is the ports on the 2g head are smaller than the 1g head. Either get the head port matched to the manifold, or get a 1g head at the same time. I would think mounting a 1g manifold on a 2g head without doing any dremel work at least would hurt airflow more than help it.