pulling heads

im pulling the heads on my 360 for a couple reasons.
1)i dont have any information on the internals of the engine, and would like to know more.
2)looking to port match to intake and do some mild clean up, nothing crazy. (might as well while theyre off, seems a bunch of people are doing it these days)

its evident there has been performance work done to the engine. once the heads are off ill beable to measure bore and stroke, check my pistons out, see what ive got for head work done, if any... id like to be able to know the specs on my cam shaft, is there any way i can do that without going deeper?

im going to have my shop do a valve job, and measure the cc so i can accurately get myself a compression ratio. that way i will beable to get a head gasket to the corrrect thickness. id like to be around 9.5-10:1 or should i be shooting for something else? or should i get cam specs and then shoot for a certain compression?