Just an Update
Just an update: The SATA/IDE to USB adapter works great. When I ordered the adapter, I got a case for making a laptop hard drive into a USB external hard drive too. That also works great. Thanks very much for the advice, folks.
The only issues I encountered were associated with drive formatting. I had two "bare" drives which the computers just wouldn't see. Looks like the solution is to install a bare drive in a computer and boot from CD ROM, and load an OS (which formats and partitions the drive).
In olden days we could use DOS commands to make a computer recognize and format the drive (format x:/s being the last thing done). I don't remember what else had to be done to get the computer to recognize the drive in the first place, but it doesn't matter, because booting from CD works fine. I can use an OpenSuse DVD for that purpose.