Not at all really, most BL conversions run the batts on one side of the truck, and no-one has performed that stunt from 'Thunderball' yet. Lipos will way alot less than nimhs, hence why it will work fine- you would have issues mounting enough nimhs in the truck all on one side though, so thankfully they cant be used and so wont mess up the balance.
Let us know how those lipos work out (temps and runtime until lvc is hit); they seem rather cheap for the rated specs...
I've watched a few converted 1/8ths run and some, not all suffer with the battery on one side.
Why not split it side to side like I did, plenty of room and balance is better.
It makes no sense to put it all to one side when you can see there is enough room to balance things out and have plenty enough room for many motor options. 80mm cans no problem with my layout.