Welcome Dave. First step to getting answers to your questions is to do a search in the forums. You can find tons of information here, you just have to spend some time searching and reading. If you can't find the answer, then post the question. Try to focus on one problem at a time. If you look at the whole project, you will get overwhelmed and frustated quickly.
1. Start by figuring out if you have a short or long water pump. My 67 and I believe 68's came with a short water pump on the 350's. The brackets are different for the long water pumps like the ones on the 69's. I am in the middle of changing from the manual to the power setup right now. My 67 pump bracket has two bolts ( I think 3 3/4") holding the bracket on the front driver side of the block and the lower part of the bracket bolts to somewhere on the front motor mount.
2. Again, search for pics - Try this: https://www.camaros.net/forums/showth...ing+bracket+67
3. I have not upgraded my brakes yet but alot of the kits make you upgrade your brake lines to match up to thier brakes kits. Call them and find out.
4 Search for that one. I had to turn the bar on the clutch over to get it to work with my hooker comp headers.
5. Call the company on that as well.
6. No you are not an idiot. We all love our Camaros, you can just get overwhelmed sometimes when you look at all the things you want to do at once. Get a whiteboard or chalkboard or a wall, write all the things you want to do, then start doing them one at a time. Start with the ones that will get the car running first then worry about the other stuff. When you start crossing off items on the list, it will motivate you to knock out the next one. Focus on one small project at a time, don't worry about it, enjoy working on the car. Use the search function, then ask questions here, there are a lot of great people here to help out. All of us love to see another Camaro back on the road again, even if it doesn't have wing windows