I removed the EGR/EPR.
I removed the cruise control.
Nothing else needs a vacuum system.

What should I do with it!?

your climate control isn't vac powered? mine is, but that's an A/C equipped truck. Is yours A/C equipped or does the climate control just say "off/heat/defrost"

If his is like mine its not vac actuated. ( no ac). My vac pump haas only one connection on it for the trans. Th400.if it wasn't for that I could eliminate mine.

No AC, manual transmission.

Is there anything FUN I can do with a vacuum system?

Hide a line with a cup of some sort under the pass seat so any passenger gets suck to the seat when you start the truck? Lol

lol

you could hunt down a set of horns like i have that run on vacuum. They were made by "trico" back in the 30s and 40s to install on cars(hence vac powered). You'd need a large vac reservoir(2 gal air tank would work), some 1/4" air hose, and a valve that can supply vac to the horns at a push of a button.

Mine's a work in progress, but when giving about 16-20" of vac the horns sound like a train horn. :D:D