What needs vacuum on this truck?

[Area 51]

So, I'm thinking of ditching the vacuum assist brake master setup and going to a hydro-boost. This is on a 1995 Cummins. I'm wondering if anything else needs vacuum on this engine. It's too cold to go out and look. I guess I need the vacuum pump gear drive, but is there a way to eliminate the pump? Or I suppose I could just cap off the pump and not use it. Anyone?

 

[Area 51]

AI is amazing. I assume this is correct.(?)
On a 1995 Dodge Ram 2500 with the 5.9L Cummins diesel, the vacuum system is essential for operating the brake booster, the 4-wheel drive (4WD) actuator, and climate control (HVAC) vent doors. A vacuum pump, often combined with the power steering pump, generates this vacuum to ensure proper brake assist, 4x4 engagement, and air selection.

 

[Tank Guy]

The mode doors on the climate control system are definitely dependent on the vacuum system to operate.