Well that would depend on what you have done with your bottom end. If its just a stock bottom end, then yes you can. If you have a built bottom end, this would be ideal but you would need to consider a good engine managment/tuning.
I dont believe the valves are oversized, just better flow and overall stronger valves, springs and retainers. There are no cams with the head.
When you go with anything over a stg1 cam, then you need to upgrade the valvetrain. Cams would be the icing on the cake for this head, but you can run this with stock cams until you get something fatter and you will be fine.