If you're determined to ignore safety concerns, stand the engine up on the flywheel and brace it securely in all directions to work on the bottom end. You'll work harder and spend almost as much money that way as if you'd bought a proper stand in the first place.
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!