This is a pretty good set, I might mention using Ice Fang as an option over Roost and Taunt as Ground/Rock is walled by a good number of Pokes.
However, with Ice Fang you can 2HKO Gliscor while its own Ice Fang doesn't even come close to 3HKO'ing you.
It also helps with Garchomp, who you fail to 2HKO... even with the +1 Atk boost.
I think this set should be played not so much as a bulky Aerodactyl, but as a CB set that has the opportunity to switch moves. That's where I think you'll find the most use out of it.