I really wouldn't know. But tell me are you willing to buy the external case, if you are I can direct you to the sites that sell them and the rest is like sticking a pen drive into the usb port.
You might find a DIY on how to build a computer and that might solve the problem if you want to put the old HDD into the new PC for a data backup/recovery/salvage
Get an external hard drive, save everything you need/want from your old system onto it with easy to remember filenames, I.E. Rescue1, Rescue2 etc, then once your new systems up and running connect the external drive to it, transfer your Rescue files to the new hard drive in your documents then you can remove the external drive and sort files as you wish, hope this helps