The difference between us is that I want to keep mine and you would sell it first chance you got. The best thing you can do is just fix it up enough to sell it. Your right in thinking that any mod you do will likely hurt resale value and make it harder to sell. Mods never equate to much if any profit.
But, if you decide you cant live without it post of pics of what your doing. You seem crafty, throw a dual set of carbs on it!