Here are the pics of Delaware Bill's interior, I'm sure he won't mind us using his idea. He's a member of the NTBA and would be more than happy to explain how he did his if you ask him. In the mean time, take a look at these and maybe they will make you consider another option besides the insert, if it won't fit. Also, as was told to me once, the insert is great as long as your butt fits it. Some of us are wider than others.
The insert is divided into two specific sections for two people. If your butt or your passengers butt is too wide, it might be uncomfortable. My girlfriend has a nice size "trunk" and she will appreciate the bench seat. Now, I'll also have to make sure she doesn't read this. If it gets edited or deleted later, you'll know why!:lol:
So, here are the pics:
Notice in this pic, that Bill's sides and back do not have the top roll you are accustomed to seeing. While very stylish, it takes up almost 4-6" of interior room on that top edge. It also tends to push the top of your back FORWARD! OUCH! Eliminate it! You'll also notice where he said he had a problem matching the pleats of the upholstery. This is why I'm making mine plain and smooth. Also notice that the seat bottom tapers lower towards the rear. It is NOT flat. You can also see how it is about 3-4" thick and sits on top of the box like support where your wiring would go. Notice how it kicks up in front to support the bottom of your legs.
In this pic, you can see that he has added a back lumbar support. He told me in an email that he added this by using extra foam in that section. Remember, the human back is NOT flat. It curves in just above the buttocks and out again just below the shoulder blades. This support will help your back. I bet ya ain't seen that before!
I totally dug that idea.
On the sides, he carried his material just to the edge of the dash bottom. I also plan to do this and use carpet for the remainder of the sides that go under the dash. This would be your kick panel. I'm planning on attaching mine with Velcro, so it will be easy to remove to clean. I'm also going to try and use that area BEHIND the kick panel, in between the wood strips, to store maps, an extra key, etc. It would be like a little, flat compartment, but hidden.
In this last pic, you can see the bead at the top of his upholstery. This is common with most interiors. I don't know how to do it, so I'm going to let the upholstered sides (which are attached to wood pieces on the interior sides) come all the way up to the top edge of the TP body. When you look at the TP body, it has a lip that goes inward. I'm going to run some 1/4" chrome door edge guard along the edge of that lip. It is self adhering and should fit snug between the body edge and the side upholstery.
So, that's what I plan to do. I have been thinking about this for a while (in case you didn't notice) and it SHOULD work, but like anything, it may need to be modifyed. Do your research, ask questions on the NTBA website and PLEASE, remember to thank Delaware Bill! His design is the best I have seen as far as comfort goes.