From what I have read, srt cranks are good to 1000hp. The factory oiling is what does them in at high rpm.
There are guys on other forums running TT 6.4L in the 1200hp+ range with stock cranks. Can you say breaking the tires loose at 80mph?
I would look into the pistons a little before you use them; call Manley and ask them a couple questions. Your crown thickness needs to be thick (at least 0.230") to accommodate the higher cylinder pressures and the first ring needs to be about 0.280" min from the top of the piston so it doesn't get fried. Wrist pin is often overlooked in high hp boosted applications so you might need a thicker walled pin; the pins take quite a beating in there. Learn from others' experience.
