Reason Behind '64.5 To '65 4spd Shifter Change?

Anyone out there know the reasoning for the shifter "arc" change between the 1964 1/2 shift lever and the 1965 shift lever? My pops has a '64.5 vert with a 4spd and I a 1966 coupe with a 3spd, soon to be a '66 T1o 4spd (it's sitting on my bedroom floor at the moment...) I have everything except for a reverse light switch and the shift lever. problem is I like the tighter curve of the early shifter. (I currently have what I think is an early '64 3spd lever and smaller knob on my '66) I've been trying to think of a reason why it got redesigned, anybody have an answer to put my brain to rest? Also if anyone has a line on a Ford T10 reverse light switch I'm in need!
 
You could buy a boatload of 4-sp B/U switches- The T10, Ford, and Dagenham 4-sp all used the same switch.

As for why they changed the bend in the 3-speed and 4-speed levers, I have no idea. Can't think of any mechanical reason, possibly it was just a styling thing.

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I was told the T10 switch mounts to the shifter and the toploader switch to the transmission. Same switch, different mounting possibly? If so CJ Pony Parts here I come (yet again) anyone know for sure? I was told by an older gentlemen at work that his guess on the reason for the change is to clear the center console?
 
I was told the T10 switch mounts to the shifter and the toploader switch to the transmission. Same switch, different mounting possibly? If so CJ Pony Parts here I come (yet again) anyone know for sure? I was told by an older gentlemen at work that his guess on the reason for the change is to clear the center console?
You were told wrong. The switch attaches to the shifter. Here's the 4-speed switch, Glazier/Nolan p/n G09048.

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