Get one one of the reproduction "assembly manuals" for your car. Any Nova supply house will have them. It will show you every part you need for a stick shift Nova and how the factory put them together.

The hardest part is finding and welding the tab on the frame. The tab holds the end of the clutch bell crank. It's welded to the frame and won't be on a car that came from the factory with an automatic. If your car came from the factory with a stick, it may already be on your frame.

Everything else just bolts on as shown in the manual. Pretty easy if you have a picture.

The cost will depend on how good a scrounger you are.