Quote Originally Posted by 'Starbuck_Jones',index.php?page=Thread&postID=1863 15#post186315
Level 74 seems to be the magic number for Tank armor. Did a bit of research and found the following lists of quests that are not to far off or available now to me.

Level 72 29def Hands Expelling Gauntlets - Quest, Don't Forget the Eggs!
Level 73 32def Shield Bulwark of the Tormented God - Quest, Ursoc, the Bear God
Level 73 50def Legs Leggings of Forceful Purification - Quest, Ursoc, The Bear God
Level 73 28def Shoul Bone-Polished Iceplate Shoulders - Quest, Hour of the Worg
Level 73 19def Ring Kurzel's Warband - Quest, Search and Rescue
Level 74 19def Wep Hammer of Quiet Mourning - Quest, Wanted: Ragemane's Flipper
Level 74 17def Neck Betrayer's Choker - Quest, Betrayal
Level 74 25def Ring Solid Platinum Band - Quest, For Posterity
Level 74 52def Chest Clutch of the Storm Giant - Quest, The Storm King's Vengeance
Level 76 41def Helm Bronzed Dome Protector - Quest, Dreadsaber Mastery
Level 76 21def Back Cloak of the Hardened Tortoise - Quest, Making Peace

Belt Soul-Sealed belt of the Champion +34def

367 def total at 76. 305 at 74 and that's not too shabby on just quest gear, no rep or enchants. Past that everything else really are level 80 required upgrades. But if I get all that quest gear, it will prolly make levels 74-80 much easier if I continue to dip into dungeons
Eh....

You can buy your tank the entire set of green cobalt armor at level 70 and it gives you something like 490 defense (at 70 - obviously if you keep the same gear at 80 it will be much less overall defense)... also tons and tons of stamina. This tank set will last you until at least 76 or 78 and costs next to nothing.

Edit: from wowinsider:

It's not technically a set in that it doesn't have a name or set bonuses, but it's 8 pieces of crafted armor, made by Blacksmiths at 375 skill and equippable at level 70, that provides tons of strength, stamina, and defense. It won't get you to the level 70 Defense cap of 490, but it will come pretty close, close enough that if you can pick up a piece of defense jewelry or a trinket or two, you'll be set for tanking up until the mid 70s or so.