LoLOLLlllOool.
Sounds like a headache man.
My only suggestion just brainstorm would be to use a smaller, Ballistics battery instead of the stocker. It's about half the width, half the height, and 70% as long. Relocate that to the very front underseat where the airbox used to be. Then remove the battery tray and all that **** in the way and put the ABS module there, it's wider, and taller giving more space to fit.
It will certainly take some custom bracket building and custom brake lines, plus an expensive battery that will technically be undersized for the rocket (8 cell version). I will say though, that little 8 cell is a mothafocin beast of a battery, it has started my 3.8L V6 car!!