From what I've read and believe.....the factory 5.7 internals can't handle over $550 HP for an extended amount of time.I also am thinking about it. I have 70K miles and run pretty hard with my set up. E85 tune with over 500hp. Is it possible to get it to 700, and still keep the engine alive?
I will add that HP and longevity of engines is more related to drag racing than to actually driving fast "at speed". Meaning, going from 0-100 as fast you can get there causes more issues than just "kicking it" to go 60-100.
To me, it just depends.
Also, you definitely are adding to the issue if you start really running high boast #s in anything.
I'm seriously interested in the new Whipple SC.