Turn Signal Cancel Cam

Before you buy a new cam: What year is your A-body? For the '62-'66 cars, there is a cam available that is better-made of of much better, higher quality material than the Shee-Mar or NAPA (etc.) replacement cams, but costs about the same. It matters because the pre-'67 turn signal switch design puts relatively high load on the cancelling fingers and the cheaper material tends to snap. See here for info.