Dodge Dart Sport

I'm putting together a '73 Dart Sport right now and I can assure you that there is no way in hades I could ever get my car in that kind of condition for $7500!!!
"Buy it now" is verrrrry good advice. Just do it. I wouldn't worry about doing upgrades/mods for now. Buy and drive it for a while before you do anything....except maybe for those real shackles. There are a lot of guys on this site that can give you some very good, honest advice when the time comes to do any changes.