Stupid Question

Probably a stupid question, When doing a compression check will the compression reading give u a clue to what kind of compression that motor has, such as 9 to 1 or 10 to 1 or so on. Never really paid much attention before as long as they were close to the same on all cylinders. The reason i'm asking is when ordering a cam they ask for the cylinder pressure. What should a mid 70's stock 360 run as far as cylinder pressure?