Ok as for the stampead, yes it can be made into a rusty, there are only a few differences between the two trucks, the gearing is the main change (other than the tires of corse) youll need a different spur gear and pinion gear to keep the speed up with the smaller tires, check the stock shock towers im not shure if they are any different. I think thats all for the stampead.

As for the jato tranny, no it cant be done, this was brought up in another form of another site and you cant mount it without either using the jato chassie, (if that is done you might as well call it a jato) or creating your own custom chasssie and drilling your own holes. THe tranny is just too big, the rusty tranny is already large enoufgh and cramed into the small space that traxxas left for it. I think that there is somwhere you can get a 2 speed for the rusty, look on tower,

hope this helps you guys