1985 D150 have super six?

No super six wasn't on any of the ram trucks. Super six only came on late 70s aspen's and stuff like that. Pretty sure it was like 1977-1979 ish stuff.

Not correct.

The "Super Six" (2bbl) was available from the factory on Slant-6 passenger car applications in the United States (except in California in certain years) from 1977 through 1979 and truck/van applications from 1977 through 1983. Add one year to the end of those ranges for Canada.