4s 8000mah in a Jato is a huge pack for that vehicle IMO. I can run my rustler a half hour on a 4200Mah 3s pack. That should be more than enough juice for your needs. And it wont weigh you truck down as much.
I'm running it on a 9L and a warrior 7020.
(actually, I can almost never run a whole pack through it before I break something anyway. Its slightly over powered:p )
I can't decide if its more fun
to make it...
or break it...