6 wheeler using a hydraulic power steering pump .Where can i get plans?

I had an 8 wheel Argo and reckon I can make one using a hydraulic pump and two drive motors much the same as bobcat drive.I have a two thousand liter pvc tank to use as a body and can fabricate a ladder chassis for the wheels to attach to.Has anyone done this and documented their methods or are there plans available?I am in South Africa and I was looking for the drive train from a Dixon zero turn grass mower as a doner vehicle.Has anyone tried this?

You're going to get NOTHING like the flowrate for a traction system from a PAS pump.