Plenty of 3S's have been dropped into AW11's.
Check out
www.twobrtual.co.uk for all the information you'll ever need.
You will need to run a 3S gearbox, either the S54 natro box or the E153 turbo gearbox.
For the S54 you will need SW20 Natro drive shafts to go with it.
For the E153 you will need 4AGZE drive shafts.