thats a WHOLE lot more whp than you should even be close to having w/ a jrsc @ 6psi.......Have you dyno'd this? Id like to see a graph, if youve got one. What other mods? Nevermind...it doesnt matter. Theres no way youre making that much unless youve got a big n2o shot. And at that point you can't claim it since its not average.
This is from jacksonracing.com. Their graphs are notorious for claiming more than what you will get....and its still way below your claim - by 50hp.
Im calling you out on this one.
BUT...Your stock axles will be fine. And if they break...they break, no big deal. Just get new ones from raxles.com if they do (but dont waste your money until they do)