Hello, have just joined site. In process of building mini with home ported z6 and y8 cam and y8 intake, though I may go w the z6 mani instead. z6 head is now shaved .020, bringing c/r to what I understand to be around 11.1/1 with 2 layer metal on stock b7. Getting a bit excited about this project but am concerned about the b7 bottom and it's ability to withstand 7.5k redline? anyhoo, this is my 1st venture into D engines and am soaking up any and all info from anyone kind enough to give it to me! Thanks.