I think you should drop that Moltres set and go all the way with Specs. That way you get an incredible STAB to basically fuck up the entire metagame but some steels with Hurricane. The moveset I recommend you to use is Hurricane / U-Turn / Fire Blast / Hidden Power [Ground]. You are not going to use Fire Blast that much, and HP Ground is basically for Heatran, also Flying / Ground is a pretty good coverage to have in OU, hitting everything for neutral damage but Skarmory, Balloon Tran, Aerodactyl and Bronzong and some other things. U-Turn gives you a way to gain momentun in case you predict Rotom-W / Jirachi / Heatran and bring the proper mon in. Fire Blast sucks in rain, but it's the best answer you have to Skarmory (I think it even gets 2HKO'd by Hurricane? I need to calc this).
Also, Modest Life Orb Agility Thundurus-T 6-0s you after a Agility. This is pretty big since that is not rare. You could switch Gastrodon for Garchomp, but that would make you incredibly Blissey/Chansey weak, so idk.
Good Luck! :)