I know where you can get a bunch of R3 with W8 Comp stuff for quite reasonable. A very dedicated and smart man has been trying to make it work in Comp for years and just couldn't do it. He was north of 750 on 300'ish inches, and over $20k in dyno time.

Frankly, these kinds of projects, you need to start with a blank check and lots of crying towels. 900HP is just an arbitrary number, what do you want to do with the engine? What are the rules? S/F....Ken M