Help me decide!

Off hand, I can not remember the exact 318 and 360 cam specs, but they will be very similar to

318, 252 .400 lift
360 260 .410 lift

the 340's cam specs look like 268/276 with mid to high 4's in lift.

So the 340's cam has the highest lift which alows the valve stay open longer to let more air in which in turn raises compression which produces more powerfull combustion in the cylinder?

I'll look up an article on how cams work exactly instead of having you explain it to me piece by piece here. lol