I just finished putting my stock motor together and im using a cool head. when i was putting it back together i noticed that the pistons wouldnt drop flush with the transfer ports. the pistons are slightly blocking them. i wasnt sure if thats normal on a stock cylinder motor or not. Ill post some pics of it as well. Anyways I put that head and did a squish band test and came with about .025. I know im going to have to switch the base gasket size and that will also help with the ports but im not sure what size gaskets to get. I'm using .018 cometic gaskets right now.
http://s466.beta.photobucket.com/user/shootemup1864/media/009_zps36302fe5.jpg.html?sort=3&o=0
http://s466.beta.photobucket.com/user/shootemup1864/media/008_zps093d5652.jpg.html?sort=3&o=1