Best street susp setup?

I have a lowly 1971 Valiant 318 V8 4 door, that I plan to do a resto mod on. The stock suspension is sagging badly, and it sits way to low for my liking. Whats a good set of rear springs, front torsion bars, and shocks for this beast, to both restore its ride height, and give it some firmer handling? It's not a racer, just a street cruiser.