1994 roadmaster wagon upper and lower intake manifold removal

Does anyone know the ease or hardness of removing the upper and lower intake manifold on a 1994 roadmaster wagon? Has anyone had this done due to leaking oil from lower and vacuum leak from upper? Anyone have prices charged by a dealer?
Tahnks in advance.

The how to is found at autozone.com. repair guides. Labor time is around 5-6 hours including the usual incidentals.