Rear Springs - Which Ones Should I Buy?

A pair of new leafsprings will raise the rear end of the car right back up to stock height.
IMO there's no need to 'extra' 1 or 2" raised leafsprings. This might make the car look silly and doesn't improve the ride-quality at all.

If you have zero tools and wrenching experience at the moment, one of best advice is perhaps to try and find some local friends who are into the older cars and hang out with them to watch and learn.

Post some pics of the car showing its current stance.