Pulling motor ONLY

Need your help. I want to pull the 318 out of my 65 Valiant next month but would prefer to do it without removing the transmission. Any suggestions on how to support the front of the Transmission while it is out or is this just a plain bad idea?

I suspect it will be much easier to reconnect the transmission on the garage floor then while working under the car on jackstands ( did that once already)

Thoughts?? and thanks

Ken