The Castle 1415 is 70mm long. And my Ballistic 550 is 72.1mm... and the Ballistic fits fine. So the CC 1415 should fit, but may need some simple modifications. But note the end of the CC 1415 can is different shaped.

See Ultimate RC video on the Novak 550 fitting instructions.

Main points
-install the motor before you put all the chassis pieces (and the rear transmission to the rear chassis plate) together.
-may need to dremel out part of the rear chassis.

Good luck...