[Dafni]

I would also suggest an XL!
7XL if you're after speed, 9XL if you are after runtime. 8XL for something in between.

I have 7XL and an 8XL, and run them on 14 cells. I would suggest the 8XL to you. Can't go wrong.

And yeah, Mikes steel idlers are a good insurance for your tranny.
Driveshafts, if you can afford, otherwise you'll be waiting for replacements in no time. (BL power is just too tempting to always ease into throttle)