69 BBC Temp switch

[Mr70]

Mike
I wouldn't call the one in that picture an aftermarket part as much as I would a later generic service replacement to the GM 1969/70 assemby line #19933<span style="font-weight: bold">69</span> sender.
This is one of the misunderstood details out there today,as some assume it's their assembly line sender,when it really isn't.
To be considered assembly line correct,you want the brass one to the far left in this picture,AC #1513130-push on pin,(not screw on),and rated at 248 degrees,from Lectric Lmtd.