I've decided that the way I'm going to mount the fuel cell is in the spare tire well. It nearly fits, all I have to do is notch out the four corners then weld in 90* angle pieces and make a set of brackets to hold it down and pad it to keep it from rubbing. It'll only stick up about two inches or so. Basically, it will be sitting in the tire well and have two brackets on top to keep it from moving in the horizontal direction but will utilize the bottom of the tire well to rest on which will have to be modified a bit. I'm thinking of making a bulk head enclosure to hide it all that could be removed for racing situations to save weight but easy to reinstall for street.
My reasoning for this is that I will retain what strength the spare tire well offers, more than likely save some weight from having to make a bracket enclosure, retain the sleeper effect of the car as the cell won't be peering through the bottom and be mostly hidden from view, cell will be protected by the well in the event of a bottom out/rock/whatever situation, as well as being easier in nature to fabricate. Seems like a good idea to me.