The steam hose actually returns directly to the radiator on the newer trucks. If you can build a tee fitting you can splice into the radiator hose, heater hose or anywhere else that the water runs through. If your radiator has a small return fitting below the cap like mine does, you can return the water there. I just didn't like the extra hose running around the engine compartment so I tapped the pump housing.

The power steering pump will work, you'll just have to adapt the hoses to fit your Blazer. They use the same pumps to power hydroboost.