You can get a lot of the data you seek from Retrosheet.org, a site that is dedicated to compiling historical box score data.
They compile such things as lefty/righty splits. You can find what they have here:
http://www.retrosheet.org/boxesetc/1985/UPSLN01985.htm
edit: you may have to go to individual player pages to get all the info for the 1985 Cards.