I finally tried to submit a 3D drawing. I can't submit the attached drawing because

1. It looks like crap

2. I'm a rookie at 3D

I'm hoping that somebody here has some great advice for me about all of the extra lines.

Thanks for the help. 

Try using ACAD's "Hide" command or "Sectionplane" command.  Both should give you some much better results.  There are a couple of threads for sectionplane, just do a search on that.

First thing: Set your DISPSILH Settings in Autocad to 1

After that make sure that your viewport on your Paperspace Tab is set to Display Hidden on Plot, you can check this by selecting your Viewport and looking at the Properties.

Do NOT use any other view settings in your Model Space on your Drawing Tab. Autocad will slow down exponetially the more that you set the Viewports to show hidden, conceptual, or shaded while in Model Space, that is why you set the Viewport to Show Hidden Lines on Plot.

Try that and let us know how it goes.