Here is a thread with some good photos to get you started:
http://67-72chevytrucks.com/vboard/s...d.php?t=547915
I posted a pic on page 3 of that thread that shows the "Keep Your GM Truck All GM" sticker on the side of the air cleaner.
I don't have any pics of it at the moment, but my 72 still has the original emissions/tune-up sticker on the driver side inner fender well. And I believe the cooling system info sticker goes on the top edge of the radiator support ... seems like I remember having a radiator support around here somewhere that still has the remains of one of those stickers ... I'll see if I can find it to get a pic.