I have a hydro boost on my 454-powered '98, 2500 Suburban. I like the way it works and there's enough boost to heat the brakes when pulling a trailer with little effort. But installing a steering pump in my already crowded engine compartment on the 1-ton isn't an attractive option. It will require a complete revamp of the brackets for the alternator and A/C compressor, preferably with the steering pump on the ignition side of the engine.
Years ago I added a vacuum reservoir to my 1-ton. Originally it was to power the vacuum wipers and the hydrovac and incidentally the vacuum controls for the HVAC system and cruise control. I used an air tank for a semi trailer, bought new and was inexpensive. Hung it on the driver's side frame rail and plumbed in some flexible 5/8 copper tube over to the hydrovac on the other side of the frame where the factory put the hydrovac. Didn't even have to drill any new holes, thankfully. I added a check valve to the inlet manifold side. No longer have the vacuum wipers or vacuum cruise but I'm glad to have the extra vacuum. With the engine off I can hear the sucking from the hydrovac down in the corner of the cab for several brake applications.
