I'm going to do my headgasket at the weekend and i've got a .57 Cometic gasket but what i want to know is......

What will the compression be using a std 200 block and 2wd head(pressuming it hasn't been skimmed yet
Also if i need to skim the head whats the minimum height on the head with this gasket,i know the min height normally would be 138.67 or sumat but this head gasket is well thick!....just like me really

Also are all head bolts the same cause i've been told theres 2 different sorts????just brought some and i don't want to use them if there not right

All advice appreciated