Need quick advice on Piston Damage

I was just at Pampena Motorsports this past saturday to finally get my 4 year build tuned(super exciting as you can imagine).. Well right away Ray noticed something wasn't right, and sure enough my cometic head gaskets were not holding. I was getting exhaust gas in the coolant passages, and pushing coolant out the overflow. Ray was really cool about it, didn't charge me for his time or anything. He suggested I put fresh OEM Head Gaskets, and Head bolts(had ARP studs on there). So I set myself on a mission to be back on the dyno in just one week. I ordered the parts from Cherry Hill, because I knew they would be in stock and I could just go pick them up, which I did (5 hour round trip).

Well I finally get my rear head off and find damage to all 3 rear pistons, and also my head. It looks like something had gotten into just the rear bank somehow.

http://i233.photobucket.com/albums/e...6222051502.jpg

http://i233.photobucket.com/albums/e...724_140948.jpg

http://i233.photobucket.com/albums/e...724_141554.jpg

http://i233.photobucket.com/albums/e...724_141637.jpg

These are Ross pistons by the way. Power goals are 550awhp on 93 pump gas, no meth or anything. Would you run them?

Should I continue with reassembly or would those spots cause further damage?

Full list of mods are below:
Shortblock: Ross pistons 40 over, forged crank, shotpeened rods, ARP rod bolts, 3SX crank pulley.
Heads: Stage 3 Port & polish, 3rd gen lifters, dual hi-rev springs, titanium retainers, ARP head studs, Fidanza Cam Gears.
Drivetrain: Pampena built 5spd, Bellhousing brace, 300M 25 Spline OP shaft, Maximal T-case brace, SPEC Stage 3+ clutch, and RPS flywheel.
Cooling: FFdynamics rad and fans, IPS Setrab Oil cooler.
Fuel: Hotwired Walbro 400lph fuel pump, -6AN feed/OEM feed as return line, 3SX Fuel Rail Loop, PTE 680's, AEM AFPR.
Goodies: 3SX TD05 kit, AEM EMS, Modified CX Racing FMIC, AEM TruBoost, ATR Exhaust.

Thanks,
-Adam