When did mine, I used 3 floor jacks. One under each Trailing Arm, and one under the diff.
Once the DL, Shocks, Calipers etc... are disconnected, just roll the assembly out from under the car.
If you are on create it is easy.

When you install it, roll it under and then lift up, Connect the Sub Frame Bolts, install the springs and rubber pad.
Lift up making sure the Springs are in their pockets.
Then put in the 4 13mm bolts for the Diff Mount.

There is a number of ways to do it.

If you are interested in the cross piece for the jack you posted that Pelican shows.
Harbor freight has it and on sale for $39.99.

Steel Floor Jack Cross Beam


Charlie

Sent from my pos computer

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works