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Most 300RWHP motors are lucky to get into the mid 90% load range, this one looks like its going to make a wee little bit more. He has to figure out some spark issues at 7000 before it hits the dyno, then its going to 7500RPM with a 200 shot
The "Modfather" John Tymensky at Modular Performance did the shortblock, you would have to ask him or the owner on those details. I know the ring locations are moved, the piston notches are deep, and its a 3V windage tray.