At the top of this page is Carter Carbs
http://www.oldcarmanualproject.com/manuals/Carbs/index.html

Also you might check the "Other Sites" at the bottom of that page. Please note: Some of the pages have JPEGs of Shop Manuals and are slow to load on dial up. If you print them you will use Lots of Ink.

250 Integrated Head / 1981 C-10 Pick up.