Nice Jim! That is basically my next engine but with higher compression. Want low to mid 900s and looks like with more compression it will do it easily.
If you are looking for low to mid 900 HP, using a big bore block, and building with all new parts, then the 572-13 heads are probably a better starting point. Using the better head allows you to soften up the camshaft a little bit which allows the parts to all live longer. So you can make the same power but have a longer life.
