Yes, I have done it. I will be putting some info in my build thread but I'll cover it here as well.
Let me start by saying, this was not a weekend project. As with most custom fab projects, it probably took 3x as long as I thought it would (plan accordingly for the amount of beer required).
1. Relocate the windshield washer fluid tank forward by a few inches.
2. Build a battery tray to hold 2 Optima batteries.
And don't forget to make up a bunch of battery cables.
It is just that easy.
Actually, it was a very time consuming project that involved welding, machining & whittling plastic. The pan is aluminum with fitments welded to it. There is a UHMW sheet to cover it that the batteries sit on. The parts that hold the batteries to the pan are machined out of aluminum. Then there is a UHMW sheet that tops it all that I mounted some OD the electrical distribution on.
I may have a mental illness.