Well, you need alot of $$$ if that's what you want to do.
The rally gauge light bar goes for a couple of hundred on E-bay. You will also need the switch panel and heater bezel(depending on if you have AC or not). Then the 70-71 gauges themselves are expensive. Most of the ones for sale need the clock and tach rebuilt at least.
Oh, and you will have to swap out the oil pressure sending unit, add power to the clock, and switched power to the tachometer as well as a feed from the "-" side of the coil.