Motor mounts

Are you sure it's the driver side? It says modify the left, which is the passenger side. That's been part of my dilemma, the thread I found also says driver side. But when I try to install it's the passenger side that needs modifying. That's why I thought I had the wrong ones.

Positive! I just looked at my 66, and it makes sense that the drivers side needs modification, as that is the oddball side on the 340/360. Not to mention that the drivers side of the car is considered the left side! Think of a European car, which are called "right hand drive"!