Might be rather tricky, the BL specific savage chassis has special TVPs and mounting points for the electric componants. You could always slap the batteries onto the outside of the TVPS like Lincs Hv savage setup... or was it Sike...
Damn you Serum, damn you and your stunning trucks. Not much space inside the TVPs for motor, esc and batts though, not without the super-duper extended chassis it looks like.