1982 18ft Tracker--Should I or shouldn't I???

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I own a 1982 18ft Tracker/Seacraft center console. It has an old 1991 Evinrude 150 that eventually will need to be replaced. Need some help deciding if I should sell or fix. The fuel tank needs to be replaced. As far as I know the transom, floors, tank....EVERYTHING is original. The floors and transom seem very solid. I'm mechanically inclined but do I want to open this can of worms? What are my costs going to be? I know its not a potter built so is it worth doing all this work? I know mostly whats involved by lurking on this site. Thanks for your input.

Great site with great info.