Too much horsepower?

I was wondering how much power a 30 spline 8 3/4" can handle. I was just about to order a new set of Moser 30 spline axles for my new 410" build(close to 600 hp), but I wonder if I shouldn't just get a set of 35 spline axles & matching spool, just to be safe???
Yes I would just order the 35 spline axels and spool,better safe than $orry.I have a feeling my gears will be next to break(bought new)I hope your also buying new race gears?Here,s a pic of a 25 inch 30 spline race axel from STRANGE.Running behind a 500plus HP SB.
View attachment 66 Dart project Nov2010 214.jpg

View attachment 66 Dart project Nov2010 216.jpg