For what its worth, mine makes a shade over 600 with old iron heads, old school TRW pistons, NASCAR rods, and a .640 lift roller, with a cross ram and two Holley 660's. Stock stroke, 434 inches, 6600 rpm. Far from exotic, it is basically a SS engine from the sixties, with a little less camshaft (most of them used old R296 Cranes)and smaller carbs.
With newer stuff, 700 hp is pretty easy.
"Old age and treachery trumps youth and enthusiasm, every time!"
