Glue is essential. As you build, you will know which tools you need as their need arises. If there is paint (even chrome) on those parts you are trying to put together, it will be harder for them to stay together. Scratch any paint off and then you'll see how easy they'll be. I use masking tape sometimes to hold parts together and to paint.
Awesome job Dave!! One of my favorite trucks. I just finished one like yours and I'm currently working the Bandit Trans Am. It's amazing to me how you guys can rework a kit that was put together years ago. Looks great.