I'm not %100 sure on this, but I don't think they are compatible. Usually Losi and Associated don't buddy up on things. The trucks are too different from each other.
The bodies are not interchange. I know for a fact that the mini -T crowd pleaser will not fit.
The RC18T's rear shocks dont fit in the same humps as as the mini-T. They maybe able to make a body that can handle both but so far I have not heard of one.
__________________
Last place in the A Main is better then first in the B
I talked to Tony Phalen of Associated this weekend. There are already holes in the rear shock tower to accept extended body mounts. They just are not out yet. TC3 rear mounts can be made to work with just a little work.
__________________
Last place in the A Main is better then first in the B