This ancor should be fine!
I think this is what Just another sign guy is talking about.
These things are ridiculous.
http://www.wingits.com/MASTERAnchor
I put one in the wall of the shop (5/8 drywall) and put a big hook on it. I literally hung off it. And I'm not a small dude. 255 lbs. Held no problem.
Pricey though.