What have I gotten myself into?

Good to see you getting after it with the filler. Go for it, the mistakes sand off. Maybe you're past my level in this but I have to say, I have just enough experience to know that the advice given by 67Dart440GT in the thread below is highly valuable, especially when it comes to laying down filler. The good stuff starts at post #18.

http://www.forabodiesonly.com/mopar/showthread.php?t=176192