I think he means if the current 360 blows up, to put all his top end on the 318 and then swap motors. That's a chitload of work just to go slower. He's talking backing up his 11.0@123 with a 12.9@106 or something.
I'm still confused why OP wouldn't just build up a 360 short for a spare and sell the teener.
And Ima thinking the plan is then to fix the blowed-up 360 and re-install it, so then that's undoing all that chitload of work and redoing it ..... again
Or did I misunderstand?