4l80e rebuild - what does it need?

[cdoggy81]

Since the 4l60e costs a ton to build correctly in order to hold up to higher HP levels I'm looking to go with a 4l80e for a 550 HP LS3. Question is what 4l80e should I be looking for as a rebuildable core, what should I get to improve performance & will a std rebuild hold for street use?

Locally I found a 2005 4l80e out of a 2007 2500 Silverado for $200.



I was going to then get the Transgo HD2 kit for it:
https://www.summitracing.com/parts/trg-4l80e-hd2

Should I upgrade frictions too? If so do I go Alto - Red Eagle, Borg Warner - High Energy or Raybestos - Stage 1

Anything else I am missing?