Overdrive Transmission for 630 HP motor

Have you considered a gear vendor OD with your 4 speed? May not have to cut anything in your truck.
I have been looking at that as well, although I am a little Leary about adding another possible breaking point on the drive train. Has any else used or have knowledge on the reliability in real world applications?

I always thought they were rated up 1000HP but do not know for sure and have no real world experience. @AJ/FormS