<VV> oem Oil Temp Sender ???

[Chris & Bill Strickland]

Dear Experts --

Yes, I am aware that the original 1960 Oil Pressure Sender was relocated 
from near the dip stick tube boss to the oil filter adapter because of 
leakage issues, but I didn't know (or don't remember) that the very 
early cars also had an oil temperature sender installed in a casting 
boss in the same area of the block, below the dipstick, instead of the 
cylinder head temp switch.  When was this change made?

This becomes more curiouser to me, as I also have a 164 ci FC block that 
also has this OT boss, which is drilled and tapped. Did FC's continue to 
use the OT sender? Wouldn't this boss  have at least been eliminated 
(saving aluminum) on the new castings for the 164 motors?

One other early (145 ci) car engine that I have has the plug in the oil 
galley passage by the dipstick and no OT boss