I would also send my valve body/channel plate/spacer to TEP. (Heck, I did) They do a great job and add all the upgrades plus a few other items that do wake the trans up and keep it running like it should.
Depending on how far you want to take the car, I'd plan ahead and maybe have TEP build the entire thing. Since they build them all the time, they have the right tools, tricks etc. And trying to get a couple of the seals into place on our transmissions is best done with the proper tool. Yes I built my own with a TEP channel plate/VB/spacer setup and a bunch of other parts from Dave. However it too a good deal of time and effort to try and ensure I was able to put all the seals in properly.
