61 valiant turn signals ??

We've seen plenty of threads about ebay signal switches and cancel cams. End users tweaking the metal contacts and the plastics trying to make the parts work like they are supposed to. Cheep aftermarket junk is exactly that.
How hard is it? Its a lot harder when you have locking wheel and column mounted switch, all the later model stuff. Yours isn't so bad. You'll need a steering wheel puller. You may have some difficulty at the harness connector, moving the wire terminals from one to the other. In any case It's hard enough to justify investing in a quality part.