Shock Recomendation for 72 Demon 340

From your description, go with standard Monroe gas shocks or for a little firmer ride the KYB's. You don't need anything more expensive than those. I might use KYB's on my Barracuda convertible, but more likely I'll go standard gas shocks like we have on my son's Dart (both cars have 440s and .890" torsion bars and factory big block sway bars).