Vac Diagram for '73 C-10? Please Help!

[Traci_DuBois]

Hi folks!

I bought my son a little '73 C-10 (with '74 and '79 parts identified so far) this summer. He is required to learn how to tinker before he is allowed to drive . . . .

Although these are fantastic vehicles to work on, I am having a very hard time coming up with the Vacuum Diagrams for it.

The VIN says it has a snortin' V8 in it, but alas it's just a mere 250 snoozing in there. (Inline 6 with 3 on the column)

I have the shop manuals and supplements for the 74-76 years, but nothing that I can identify as the vac diags.

Can anyone tell me where to find a set of 'em?

BTW, I can share info out of my manuals if anyone needs it.

Thanks much for your time,
Traci in Texas (and Wes, too)