Hi,
I'll preface by saying you'll have to check to be sure everything is compatible, of course, but I just bought some parts from Figuarus, who has your pump and some other related equipment. If you're cool with paying for shipping from Salt Lake City, that is. He has photos of the smog pump and a few other smog-related things available here:
viewtopic.php?f=8&t=25979He's a good guy. Contact him to find out the model year of the truck they came from.
I've also got unused smog equipment on my 75 luv, but I cant speak for compatibility with the 76. The info section has parts manuals which should answer all of those questions for you.
Let me know and we can figure out whether I've got anything you need.
Good luck!