Just looked it up.
The three special editions (white, red, yellow) that year all had white tops, but the yellow cars were offered with a choice of black top/interior as an option. Didn't know that.
I actually sold a white one we took in on trade. It was a real nice, original car.
Saw it a year later, and the guy had put a black top on it because he didn't like cleaning the white
original top!
The one you saw looks like a nice example, though!