Rebuilding My Stang Any Suggestions?

Welcome to the site. Start by reading the sticky threads at the top of this and the tech forum.

Make a plan by researching what others did and worked and didn't do. Find a reputable tuner and ask lots of questions.

Make a budget, then double it. That will be a realistic view of what you will spend, especially if this is your first major project. Hell I've built quite a few cars at this point and still don't stick to my original budget. Either because something unforeseen breaks or I want more power. (usually more power then I break something with more power lol).

Good luck. Just remember the only stupid question is on that goes unasked.