Where jacks and stands are concerned, bigger is always better. A "3-ton" stand, for instance, is actually the capacity of two stands. Each stand is designed to support 3,000 pounds, so the pair actually has the ability to support 3-tons. You'll need a hard, level floor, also. Jacks are for lifting only- - - -don't ever get under a vehicle supported only by a jack!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!