It doesn't have the proper mounting plates. That's a diecast chassis. The chassis I hacked had this plate riveted to the frame, it's the same style as the Phantom motor mount. You need to find a chassis with this mounting plate (or make one).
You're looking for mid to late 90's stuff like the Virginian Rectifier with the stamped metal chassis. They have the mounting plate for the motor that matches what you need for the Phantom. I'm sure you could adapt other stuff, but this was the path of least resistance and since the plate provided the mount and proper height, it made the job easy.
