Might want to check out Judd's (Vintage Windmills) build. He is restoring a '72 K20 and there is a lot of information there. He had a Quadrajet rebuilt with an electric choke update that you might be interested in as well.
http://67-72chevytrucks.com/vboard/s...d.php?t=493477
There is also 72KAY20s build too... nice orange truck...wish it was mine!
http://67-72chevytrucks.com/vboard/s...d.php?t=496965
DeadheadNM's build too... there is just something about an orange truck....
http://67-72chevytrucks.com/vboard/s...d.php?t=528308