Use a 3 foot cheater pipe on a 3/4" drive breaker bar and "GIVE IT A GOOD GRUNT" like my first boss used to say. I used to use a 300 ft/lb 3/4" drive torque wrench with a doubler to tighten 220 Cummins cylinder head studs- - - - -1" diameter studs with fine thread nuts and flat washers that torqued to 600 ft/lbs- - - - -18 of them, 6 per head! That was a good workout even for a 30-something year old guy! I wouldn't attempt it now!
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!