Quote: .......... Kodak Super XX (I'm not positive on that name).......
Yes, I can remember Super XX back in the very late 40s or early 50s when I was just beginning with a Box Brownie.
I wouldn't have thought Tri-X would cause too much hassle for a shortest shutter speed of 1/500 except with very sunlit subjects. A yellow (or darker) filter might help with that one. Most things I find interesting for B&W are a bit dark so 400 or even 800 EI is quite welcome.