It can be tough to fit everything under a buggy body. Your lipos are kinda long so you don't have room in front/behind the batt tray where most people mount their ESCs. That leaves the rx tray and CD area. I had to raise the body posts by ~10mm and even then I had to also cut the body a little to get everything to fit.
My
conversions site has a couple of Hyper8 layouts that may give you an idea or two.