Here are some pictures of the upper intake manifold and the lower intake manifold gaskets.
As it turns out, the UIM was actually in pretty good shape. the build date was 11/10/1999, the car is a 2000 so it was definately the original. The new intake is a Dorman "performance" intake and looks to be slightly heavier built than the original. But, Like I said, the coolant leaking problem wasn't the UIM, it was the lower manifold gaskets that had deteriorated to the point that in some areas the gasket was completely gone!
First picture of the LIM gaskets... noticed how warped it is in areas:
here is a close-up of one section. Large chunks of the gasket are missing even. My mechanic told me that they were already gone when he pulled the gaskets off.
This is the upper intake manifold itself. The EGR passthrough looks fine. There wasn't any warpage at all, I just had it replaced anyways just incase though.
It probably could have been saved and reused, I was just uneasy about keeping it since it was almost 8 years old!
Here'* a breakdown of the cost
Dorman intake manifold: $179
Felpro Lower intake gasket set: $50
GM plastic coolant elbow: $15
Valvoline 5-w30: $10
oil filter: $4
2 gallons DEXCOOL: $22