the slash body should be pretty close to the aftshock's. maybe its a tad shorter.
do you have a local hobby shop? if you do, you could see if they got a slash body and bring your truck and see how it might look.

Or, if you dont mind going aside from the SCT body, there is a good chance the proline VW baja bug body for the slash's will fit on the aftershock.
that body will certainly fit inside the bumpers.