I think the biggest hp Vipers out there are somewhere in the 3-4000 hp range lately. Built correctly I'm pretty sure it can take it, but as with any extra high hp build it's usually more a question of "how long" it puts up with it and how often you might have to change parts out. Viper Specialty has 1500+ hp packages for the gen 3 and I think I've seen some dyno runs of builds here in the 2500 hp range, though those might have been gen 4 engines. Largely similar from an overall architecture point of view, but I think there are some differences in there and when you are talking about that much power every little strength increase can matter.