Exhaust smells like turpentine

[WesB]

Anyone have any idea why my exhaust would smell this way? I know that my truck runs rich due to a bad computer/carb combo and that I need to do the duraspark conversion, but I wouldn't think it would smell like that. I know rotten eggs out of the exhaust would be a bad cat, but the truck had a new cat and everything behind that replaced a couple of years ago, so i wouldn't think it is the cat.
BTW incase you didn't look to the left, this is on an 84 B2, 2.8 v6 (stock),
c5, d28/7.5 combo.