TF727 shift/valve body improver kit suggestions/preferences

We are getting ready to pull apart and inspect the 727 for my sons project car we're building.

We're hoping not to find any surprises. But we're ready for anything. Lol.

In the past we have used trans go products with great success. We are looking at the stage 2 trans go kit currently.

Any suggestions on what others have used, and had good luck with?

Thanks in advance. Eric and Jason