I recommend to watch the David Vizard Powertec 10 youtube video on the 1,000HP SBF block modifications. The same shop can/will do the same on other manufacturer blocks. Doing this on a SBM would allow a safe 700HP stock block to run reliably.
David vizard is a story teller/book writer. Tons of "theory" and "formulas" But hes also a crook. He **** a good freind of mine who has a machine shop also, out of a bunch of labor for machine work he never paid for.