Since your not going for a stock truck, and steering column is missing, if it was me I would go for a nice after market steering column with tilt, turn and dimmer.
As your using a V8 it should be easy to add the power steering pump and go for the power steering box.
Get your engine and trans set in first as you will need them in place to fit in the steering up grade to power and exhaust routing. Wiring also needs the engine in place and steering column itself in place to route the wiring.
If your thinking used parts for power steering search the junk yards and find the whole system pump, hoses, brackets, and gear box from one donor (matching system).
The other nice option is aftermarket kits the common choice which is the mustang rack and pinion setup, adapters are out there for a large variety of installs in different vehicles.
One very nice steering setup for non-stock.
