Removing the cylinder head and timing chain and replace any bent valves instructions needed

Need any help. I can get to remove this dual cam head and timing the new chain and any special way to treat the cams? Any downloads would help. Have done head jobs before just not on the truck listed above truck with dual cams. This is a new head and chain ran good for 2 months then shut down, chain link broke? Engine turns over by hand easy. So any help is grateful Mike.