I have my shift points set at 5960 and rev limiter set at 6000. I will most likely drop my shift points down to 5900 or 5800 when I put my torque converter in so I dont hit the rev limiter. The BD tuner is really safe, there are some guys on here with custom tunes shifting at 6200 or even 6400. Just set it so you dont hit the rev limiter. Its like getting kicked in the nutz for a motor, it probably wont kill it but it doesnt feel good.
Stock shift points are 5600 for WOT.