look at the cam journals to make sure they are not scratched. Make sure you get all of the cam journals. Check to make sure the mating surface on the bottom of the head does not have any deep scratches. Look at how the valves are seated in the combustion chamber. They should all be seating pretty much flush and all look alike. The valves themselves might be a little diiscolored (carbon/ash) when comparing them to each other based on which way the spark plug was facing, don't worry about this. What you do need to look for is color change associated with melting metal (burnt valve), kinda hard to tell, look for slight disfiguring of the valve head by the edge.

You can run the throttle body, no problem. If you want to upgrade in the future it takes 5 minutes.