TH350, NP205 & adapter seals/gaskets/o-rings?

[Toro]

I need to have the transmission rebuilt in my '72 Blazer. I'm removing the transmission, adapter, and transfer case as a unit. This has been done at some point in the past because the rivets that attach the upper reinforcement on the crossmember have been drilled out and replaced by bolts. This makes it possible to lower the entire assembly.

Once it's out and the transmission is off to the shop, what other seals, gaskets, o-rings should be replaced while they're easily accessible?

Input and front/rear output seals on the NP205?
Are there seals inside the adapter, I've heard someone mention an o-ring?

Just making sure I do what I can while it's all out.

thanks
Jon