There's a few things I did to my 66 when I started on it that I have no regrets spending the extra money for. One is the fuel system. We cleaned the tank out and blew out the lines to get it going but he first year I changed the fuel filter 5 or 6 times and every time the gas I would pour out was orange. A new tank, sender, and lines (and another carb overhaul :BangHead:) fixed the problem. It has been working flawlessly for 10+ years.