Invest in a media blaster, and start tearing everything out. Strip that bad dad down and don't miss an inch. Inside and out. Paint and polish. If you put her back together with care, you'll have a clean *** car. That will increase your value quite a bit. It's a ton of work, and I doubt you'll want to part with her after investing such tlc. I'm half way done with my car. It will be showroom condition when it's complete. Anyone can bolt on random parts to any car. The problem with that is that you put a new rear end in a car...fine and dandy. It may increase its performance, but every car comes with a rear end. Simply putting a new one in doesn't increase it's value. It's supposed to be there. You have to set your car aside from every other car out there. Making it exceptionally clean will distinguish your car from every other rust bucket out there. I'd pay much more for a clean car, than a cancer ridden, molested hot rod with better performance. When a person looks at buying a vehicle, they will pay top dollar for a clean car because they don't have to do the restoration, and they can bolt on performance as they deem desirable. Keeping it in its original condition will make its value much higher. It's seems counterintuitive, but it's what a buyer wants.