I had this problem when I first got my 85 Bronco.  WHat you should do is
head to your local Ford dealer and see if they will let you look at their
library of vehicles manuals.  That's what I did and they were a great help.
I found what I needed, and they even madecopies of the book for me.  Keep in
mind that since your vehicle is fairly old they may not have the manual
(attrition, people not bringing it back, etc...).  Its worth a shot though.
I got all mine hooked up and passed emissions test here in Oregon.  Had to
replace a bunch of stuff including the air pump, check valve, and a bunch of
vacuum hoses.  What a mess.  I'll smack the previous owner if I see him
again however.  Good luck.

Tim B.

Steve,

A lot of the time on those oldie but goodies you can just follow the hoses
back to where they came from.  If you think they go back to somewhere useful
try plugging them up.  I know that I used to do this on the Carburetor
Models all the time and it helps to eliminate some of that unwanted emission
crap that the government makes them put in there.  I know that this will not
help you pass an emission's test but you might get away with it depending on
where your from.  Also might even make that old pickup a tad bit faster.