So I picked up new pistons yesterday.
http://www.jegs.com/i/Sealed+Power/844/H617CP/10002/-1
I have 78cc heads so it should run pretty nice. The guy at the machine shop estimates that i should be sitting right around 380hp and just north of 400ft lbs of torque with my setup. I now have all the parts I need and The hot rod institute will be building my motor starting this afternoon. In fact Im leaving now to go drop off my new water pump, new HEI distributor, and aluminum alternator bracket. Pics coming soon!