Need help verifying spool motor mount part numbers

I have two sets of spool motor mounts that I am trying to determine for sure what they fit. I have a used pair with the numbers 3642811 and 3642810. I have two NOS mounts with the numbers 3642811 and 3642813. From what I have read, the 2813 mount is the driver side mount specifically for 340 & 360 motors and the 2811 is the driver side for 318's only. The 2810 appears to be the passenger side for 318, 340 or 360. Does this sound correct?