It's either going on top of the quarter, ala Charger, or more likely on the deck-lid filler panel toward the middle of the car. At 6'6" and a 5" ride height to the frame, I wouldn't have a problem at all reaching the middle of the car to pump gas.
Can definitely do a dry sump, after I take out a mortgage, win the lotto, and rob a bank. I looked into it and $5500 later I would be ALMOST finished with the system. It's an option, albeit a final option, but an option nonetheless. I really can't say how much lower the engine/trans needs to go because I don't have my freaking hood yet... No idea when I'll be getting it. I "think" I'll be okay in the current location though. This is a problem with channeling the chassis into the body, I lose a lot of clearance. Exhaust is going to prove complicated as well for similar reasons. We'll get it all worked out though.