not sure on runtime, but you probably would be better off running 2 packs in parallel with the a123 in a biger truck. They really arent set up to handle that kind of load. I tried a 4s1p pack in my LS10 and it was sub par IMO. I got better performance from the running 3s2p than 4s1p.
I can't decide if its more fun
to make it...
or break it...