Bushing bolts/nuts should NOT be torqued to spec until the car is sitting on the ground at normal ride height. With suspension jounce/rebound motion the bushings are strained in torsion, and since cars spend most of their life just sitting on their tires, you DON'T want any torsional strain on the bushings in that state.

This is why storing a car on jackstands is BAD advice. Set to the maximum cold air pressure placarded on the sidewall a decent bead seal should keep the tire from going flat for at least a couple of years, and beyond that it's a lot easier and cheaper to replaced old, damaged tires than damaged suspension bushings.

Duke