id use 4 jacks for the room involved and ditch the ramps as A. in the way of your creeper, and B, less safe than a locked jack stand.
You will have to drop the front half driveshaft, and having room to do that will be convenient.

engine doesn't really need a jack, but I usually jam a piece of wood under the engine between the pan and subframe to let it sit on so it doesn't rip the engine mounts or twist them too bad when the transmission is out, and for no metal to metal connections.

Otherwise, you want that down angle as it will make install and removal quite a bit easier

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