new setup. power guesses

[66StangGuy]

any idea what kind of power i should find from this setup

holley 600cfm vac sec.
performer intake
world casting windsor sr. 200cc intake runners and 2.02 intake 1.60 exhaust valves. huge exhaust ports 64 cc chambers.

flat top pistons with valve reliefs
stock bottom end
hooker super comp headers. 2 chamber flows.

also what timing should i set these heads at. i used to have 68 cc heads and ran 12*. with more compression because of the smaller chambers should i run less timing say about 10 or whats the best place to start so i can try different ones.