The closet engine I built that made 545 hp was based off a 6.1 block, cnc ported 5.7 heads with 2.05" int and 1.57" exh valves, 4.055" bore/4.05" stroke = 418 cubes, 9:1 compression, 231/236 @ .050 114lsa, 5.7 plastic truck intake and 80mm throttle body.

545 hp at 5600 rpm was all it would make due to the restrictive plastic intake manifold. So the engine only made 1.3 hp per cube which I was hoping for a bit more.

Your gonna have to make 1.37 hp per cube to reach your goal of 540 hp which I think you can do with your tad bit higher compression, don't know much about the cam, but COMP might have them now, your intake, carb and with a 1000 more useable rpm just might get you there.