Losi 8 won't work on the starter box unless you remove the spin-start and replace it with the Sportworks backplate AND get the Losi Race Roller engine mounts or some other aftermarket engine mount:
http://www.amainhobbies.com/product_...oducts_id/9001
http://www.amainhobbies.com/product_...oducts_id/4331
You most likely won't be able to use any alignment pins because all those cars are so different that you'll have to line them up by hand.
The Rustlers flywheel isn't even oriented in the same direction as the other two so it probably won't work at all unless you wanna be taking the motor out of the starterbox and remounting it every time. And that's assuming you have a "universal" starter box and not the blue OFNA "truggy" box.
Cant I take the one way bearing out of the rustler?