Want to see pictures of your full tubbed or backhalfed a body

So i have a 69 dart i'm thinking about tubbing and have a few questions.
1.can one simply relocate frame rails and continue extending the stock wheel wells?
2.What does the term "back half" really mean.
3.what is the best material to replace the frame rail material with.
I have the tools and ability to do the procedure just have never done it. I like to do things myself and this is definitely something i want to try.
a mini tub is something i though about but for the amount of power i plan on putting through the car i believe it would be my best interests to go further.
if anyone could post some pictures of what they did for their tub job and maybe their experiences with the process it would be greatly appreciated.
My brother was nice enough to start a thread on my build -- see "New race car nearing completion" by d55dave. I have since added some more pics and info. I used a Chris Alston Chassisworks kit for this project and was very happy with it. Still is a lot of work as everything had to be cut, fit , squared up and welded for the particular application but I was happy with the kit. As far as advice goes be ready to spend way more time thinking about things than actually doing them and measure twice (at least) then cut once! The time put into thinking things through and planning makes a huge difference in the final product. This is the first back-half project that I have done and I found myself always trying to think a couple steps ahead of where I actually was in the process. Like you are doing I found myself looking online for pictures of what other people have done. I found looking at pictures of race cars that are for sale very valuable to help me determine what I wanted to do and even more importantly what I did NOT want to do.