What should be replaced on a 964 3.6 when the motor is out?
 

What are the must do's with a 964 motor out out of the car? I need to prepare my list for when the new motor arrives.

The o-ring and seal for the power steering pump drive.
The #6 intake spark plug wouldn't be a bad idea either.

Also, I'd recommend replacing:

Rear-main seal.
Front crank seal.
Intermediate shaft cover plate o-ring.

You have to remove the rear engine cross-member to replace the last two, so might as well do them while it's out.

Also the same things on the upper rear of the engine that you'd do on an earlier engine with a clutch job. The pressure sender and the o-ring for the t-stat. (I know, the 964 doesn't have an engine mounted cooler, but there is still the same o-ring in that spot.)

Thanks Tyson. The power steering pump with have a block off, but I will replace the rest.

Paul, how long untill you have that 3.6 heart transplanted & on the road?

I should have the motor by the 25th. Everything that needs to be done to the car will have been completed by that time, so I am hoping by Feburary 1.

It probably wouldn't hurt to change all the plugs while it's out. A valve adjustment would also freshen things up. Saves you the headache down the track.