Well 450whp was fun while it lasted... ~5k miles.
Failed head gasket or improper torquing on the heads caused coolant to get into cylinder #4, then with the piston coming up it hydro locked and the top of the block broke and blew out. Also the rod in cylinder #1 was bent too (Manley H beam).
So back to a stock block and stock turbo while the broken block is sleeved and built up to handle 30+ lbs of boost.