my D24T is an '85 740, it does have a sunroof though, in fact one of the reasons my parents ordered the 740 instead of a 760 was because they wanted a manual sunroof, they couldn't get the 760 downgraded to a manual sunroof.
I just had my hands on the original title last week, 82 miles on it, has 293,300 now. Was also surprised the model was listed as Turbo and not 740.