Bringing over some info from the original email traffic -
Here is a pic of the 3 types of trim pieces -

Pic from W. L.
At this time we are tracking that the first wide, what I call the 3 ridge trim, is on late '65s with floor shift, at least as of now.
The middle trim is, at this time, only found on the NL. Which would make since production wise as it is different as not to confuse it with the PL trim as neither are enter-changeable (ok, the fenders are as Greg has pointed out on his NL).
The last trim on the far right is the original narrow trim found on 62 through '65. Yes, we recieved an email from Mr. M. that he has a late '65 with floor shift with the narrow trim.
My fleet is all narrow trim for '62- '64 for column shift (my one '65 is a serial number '64) and my 2 x '65 floor shifts are of the wider 3 ridge trim.
Andy