I purchased a fully built 4T65E-HD transmission. I know the stall is either 3000, or a slight chance if my memory is off 3500max. Pretty sure it is a 3000. I'm probably going to keep a slightly higher than stock stall. If I can get enough to purchase a 2000-2500, I would sell it.
I'll check out the Club GP forum to see if I can find a deal on one. I know it is the current one ZZP used (not older models some have had issues with). It has about 500 miles on it just to make sure it worked well, and was a strong TC with good/decent daily drive-ability.