1979 Ford Ltd., badly needs windshield wipers (which I have)
but I'm not sure how to change them... any suggestions ??
Ask a friend. There are several different wiper attachment
methods, all of them simple after someone shows you.
Next time you buy wipers, tell the clerk you don't know how
to install them. Quite often the clerk will take the wipers
out and install them for you, happy to demonstrate skill and
to promote customer satisfaction.