Hi Troy, thats one big hole in the floor too...
I suggest as the next step to keep pulling bits out such as suspension etc in readiness for the upcoming sandblasting session.
Start doing research on what driveline to fit and start taking measurements and putting the plan down on paper (or electronically on PC) etc...
Also work out what will be required for rego (engineer etc) if you are doing major structural modifications which is what it looks like from the pictures.
Planning what you want to achieve always helps keep the project on track.
Dave