Need help verifying spool motor mount part numbers

[69GT]

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?

 

[WEBBY]

Drivers side is not as wide on a 340 - 360..... The passenger side is the same width 318 - 340 - 360.....Webby.

 

[69GT]

Thanks Webby.