Google "Chevrolet 250 GM TBI" and you will find several sources.

http://67-72chevytrucks.com/vboard/showthread.php?t=320356
http://baizefamily.com/
http://howellefi.com/gm-tbi-products/complete-tbi-kits/universal-tbi-kits.html


One of this days I will make the move to fuel injection.