I had a 727 in my car 16 years with the same cheap type F in it, it also had 5 drag weeks on it. No problems, i only pulled the trans to switch to a 904.

On Drag week 18 I got the trans hot in the mountains(the new 904), noticed way more converter slip than normal and the cooler couldn't be touched by hand. I let it cool off for 30 minutes then back to the road. I expected to need to change the fluid the next morning but it was as clear and clean as when I put it in.