Cam question...

Can you tell much just by looking at a limited view of the cylinders..?
i mean, sorta? if there's a dome, you'd know. sometimes you can tell what it is by the type or lack of valve reliefs. so if you could ID them you could potentially say oh it has these pistons so it probably has around this much compression.

but that's dependent on the CC of the combustion chamber and thickness of the headgasket. so you can formulate an educated guess based on those.