Freeze plugs-Yes use brass
Head considerations- Follow head manufactuers specs for tightening ( sequence and torque) and re-checking after break in
Gaskets & Bolts- you can't go wrong using ARP and Felpro is also a quality brand from my experiance
For you question on Cylinder Head Volume I refer you to :
http://www.smokemup.com/auto_math/index.php
this site has calculators for almost everything automotive
good luck,
Mike "monster"