Here is an e-bay post that has the instructions with a diagram of a slightly different jack then what I showed in the first link, it is hooking to the edge of the front lower control arm. With this style jack, even with a flat tire, you will be able to hook onto the lower control arm, which you have pictured in your post, and which is identified here.
Use this as a learning experience as to what the "control arm" is. At one time, we all did not know this term, and what this item was.
http://www.ebay.com/itm/1976-1977-CH...Eun-fg&vxp=mtr