Question about heads

Just for the record, never put valves in a head without having them ground. If you ever ground valves, you would know how far off they are. Let alone the right angles for each cut on the seats to get the right seat diameter and width. A good valve job is the key to good efficiency and power. Your engine should fire before one revolution. Your cam could be worn out, round lobes, and nothing will fix that but a new cam.