Here's a photo of my set-up. I have the engine cribbed with 4"x6" timbers. The front axle is shimmed with 2"x2"s to keep it steady.
When I took this photo, I was having a really hard time separating front and back. I was also feeling pretty gunshy so I but that jack stand under the engine side of the bell housing. It just got in the way and wasn't needed. In short, don't do what I did ;-)
The back was rolled away from the front on the jack.