You don't need to support the engine independently of the subframe. IE, you don't need a hoist or an engine support.
Raise the vehicle with a good, tall jack from the front, with the jack placed on the subframe's front crossmember. Then, place jackstands (near their lowest setting) behind the subframe, on the body's frame rail. Chok the wheels, check for stability and then lower the jack slowly. Place a 2x6 across the center span of the subframe from side to side, directly below the oilpan. Measure the gap between the oil pan and the 2x6 and shim it so that the gap is about 3/4". Put the jack under the 2x6 and raise it until the 2x6 begins to bend. The 2x6 is probably not strong enough to hold the weight of the engine, trans, subframe, etc.. That's why we shimmed the center of it, so that we can push the whole shootin' match up against the body. This will allow you to loosen all 4 subframe bolts without the subframe moving. Once the bolts are a little loose, you can align the subframe with the 3/4" diameter holes built specifically for this purpose and once aligned, you'll be able to tighten all the subframe bolts without fear of mis-aligning it in the process.
I built a 2x6 that I keep in the garage for this very job. It's about the only way I play with subframes/bushings anymore.
edit "built..." More like cut to length...