Kevin, thank you for those pictures, that turned out great. I have looked at your photos many times for reference and will do so many more times I'm sure before my truck work concludes. I have seen those rivet setting tools online but have yet to purchase one, I guess I have a reason to now. For what it is worth, it's the passenger side fender we are dealing with here. Unfortunately, the front lower part of my fender is basically gone, it's above the body line by about an inch (about where those markings are in the photo above). The patch I have does not go that high, so I guess I will have to try and build that area from scratch. No clues yet on how to do that other than lots of small pieces welded together. If anyone has advice on that part of it - I'm all ears! Thanks for all the great info.
Tom