Hi Bob,
Here are the pinouts I find for the IDE drive.
You are right the master is without any jumpers. Try it again, with the WD connected to the USB adapter, then power on the WD and USB adapter. Then with the USB connected to your computer, power up the computer.
If that doesn't work, try the Cable Select, jumper pins 1 & 2. Also make sure the 40 pin USB connector absent pin in the center matches the IDE connector. Some of those 40 pin connectors you can plug in either way!
Also what USB adapter system are you using?
I do see multiple complaints about the older IDE WD drives not being recognized. And no solution to any of them. If nothing works, do you have access to the standard IDE ribbon connector you could temporarily use to copy off the data?
One other option would be to purchase a small IDE to SATA adapter board, and connect it temporarily to a SATA cable for data recovery. In researching these small boards, the come both IDE to SATA, and SATA to IDE, so be careful you choose the correct one!