I thought of this setup for my savage and it looks like it'll work pretty much flawless and it has many positive sides and a few negatives. Plant the outrunner on the savage nitro engine plate with a basic motor mount. Run two center diffs from a buggy/truggy on a custom center chassis mount. Run a dogbone from the outrunner to the 1st diff. The 1st diff powers the 2nd diff which powers the rear/front diffs. Its kinda complicated and some of you may think it is pointless to do all this work for this but I want to try it and see how well it turns out. Keep in mind both center diffs will be locked and will have hardened steel ring gears for added durability. I like this idea because it free's up some space and it puts less stress on the outrunner.
Heres a pic of my idea...
(Key- pink= nitro engine mount, blue= outrunner, silver slab infront of outrunner= motor mount, you probably get the rest...)