Perhaps PM lincpimp and get him to convert the pack to a 3S + 2S pack, then you should be able to fit them in each side. I had him do this with 2 - 5S packs of mine to put them in my Savage Flux.
Splitting the pack up would be the best bet. Can a 3s pack of the cells you have fit in the revo compartment? take the height of your current pack and multiply by 3/5....