Last year I threw my back out again wrestling around engine blocks.
I needed something that would help me (and my back) move and lift heavy stuff.
We have an auction house in our area that deals with light industrial and office.
I've been looking for something like this and finally ended up a winner!
It lifts from 3" to 57", can lift 800 pounds and isn't much bigger than an appliance dolly. It has a hydraulic ram.
My back loves it as I cleaned the diff and removed all the brake hardware on it all while standing up.
[this one is called a Stacker].