Mark,
Directly underneath your transmission you should find four holes with rubber plugs that are inserted to protect threaded bosses. You may find two more on each side of those four. This will give you a horizontal support (girdle) or platform to mount your upright posts. I have crawled under and made a paper template of the exact position and transferred the drawing to 3/8" flat stock and drilled accordingly. You will also be able to make diagonal supports to the posts and tie in to the frame rails.
From there it is a matter of clearance - front bumper and hood, and finally the fabrication of your hydraulic controller valves and taping into pressure and return lines. I hope someone will provide pictures as all of mine are on the other hard drive currently in the pc hospital.
That looks like a steal for the money. Hope it works out well, good luck, Mark