When I was in the service, the tank repair shop I ran had a torque multiplier wrench that was basically a gear reduction box with a lever that you'd put on the ground. Socket on the bolt, torque multiplier on that, then a ratchet or breaker bar turning the input of the torque multiplier. It was a 3/4 inch or 1 inch square drive, IIRC. And took the biggest mechanic in the shop to even carry it.
Here's' a similar item but more compact than I remember.
Torque Multiplier WrenchHere's something that works on that principle, but somewhat different in operation.
Cheater WrenchFor a spring loaded impact thingy to work, you'd probably have to turn it backward to wind up the spring which would then release and drive a hammer against the part holding the socket. Not impossible to do mechanically, but kind of complicated and cumbersome, IMO.
