i am pretty sure they are only good to 300hp. most stock dodges only have around 245 anyway.
The horsepower isn't the problem, it is the reserve torque capacity that kills them. But if you are somewhat careful in how you apply that torque they will hold up to a decent amount of power. There is an NV3500 in my truck and if you watch this video you can see I leave and shift conservatively. That truck has the factory installed clutch and transmission with hundreds of passes on them.