Lower/upper intake replacement 3800 series 2

I'm going to be changing the lower/upper intake gaskets in a 2001 Pontiac grand Prix 97,000 miles. 3800 non supercharged. I don't think the upper plenum is leaking , I see oil coming down the side onto the compressor mounting area and alongside the motor on the other side under the thermostat area. So I'm thinking lower gaskets


I have read a few tutorials an I should be fine, hopefully. I have done a few lower gaskets on 3100 motors but never on a 3800. I just have to make sure I have the torque procedures. I looked into getting an aluminum intake off the series three motor, but I don't have the time and tools to do fabrications even if they are minor to some.

I was thinking to order the atp upper intake I hear it is the better plastic one
I wonder if it comes with the upper gasket , none of the pictures or description says it is included. I will be using the newer gm lower aluminum gaskets.

Did you ever go ahead and do this?

No ...My coolant elbows were leaking very bad and I changed them. I pressure washed my engine a few times and couldn't find any other leaks as of yet... so I'm going to drive it as it is, until......