OK, I have a TH350 w/shift kit in my old Ford Coupe....
Don't know much about it as the previous owner just stated it was "Pro-Built" in the Craigslist ad
Checked the fluid and it was a little low on the stick, but I'm not sure what fluid was used
Most manufacturers that build performance street/strip trannies usually suggest Type F and that's pretty much what I used back in the day on fresh builds, but I'd usually do a dry fill with either Type F or Dex2/3 (never mixed)
Odds are they probably used Type F in this tranny, so I topped it up with a quart of Type F, but in case they used Dex instead, would I have any problems with mixing the two?