Im with Josh, I am also building a Turbo Big block 512 with big ez 325cc heads. I am also using a 106mm turbo with a 1.5 ar. I plan on going to e85 Blow through dominator with a methanol injecter when needed to chill the boost. 1000 hp will be a piece of cake for that build and will be very easy on parts. Good luck and post pics!!! I hope to start posting my mock up pics next week