My two cents FWIW,
If I were you I'd buy the Scat crank for six inch rods so that you can get the rotating assy. internally balanced, as it sounds in your post(big cam, 200cc heads) you'll be turning allot of rpm. You didn't say if it was a one or two piece real seal block, so I can't list a PN.
I'd also buy the Scat 2-ICR6000-7/16, 6" I-beam rods with the ARP cap screws and bushings for floating piston pins/ 6" rods.
For a little more detonation tolerance I'd buy Forged pistons for floating pins.
I'd also buy a Powerbond balancer PN PB1046ST. Has engraved markings and a better reputation than the Powerforce dampner.
PS I'm no pro!