Small block 426 stroker with trickflow heads. How much HP.

I think Mike @ b3 racing engines built one that went like 621 a couple of months back..
Cool. Do you remember any of what all went into the build? I was hoping for around 650Hp. I was going to build a 5.7 stroked to a 6.4 gen 3 hemi. So far I have a set of heads and a set of 13.1 compression pistons. But I have learned gen 3 hemi stuff is lots of $$$$$ lol