I agree, but will have to wait until I get it home (from Ft. Wayne, In to Atlanta, GA) and can get the valve body back out. I took some pictures of the work we did but did not get a good picture of the pressure valve.

According to the Sonnax instructions, the pressure relief valve has to look like the one pictured in the instructions for the manual valve (the one that fixes the no fill in park issue). I've got a picture of part of the pressure valve but it isn't exactly the same. My valve body is a '68 and they are a little different from some of the newer valve bodies (i.e. hardest shifting stock valve body, no high pressure relief)

I may need to look into the TF-2 or Transgo kit mentioned earlier.