Trying to identify Thermo Switch

[Odoyle]

Trying to figure out what the ignition mode thermo switch looks like. I have two sensors I removed from the bottom of the intake manifold off a 77 and can't remember which one it is, one is larger than the other, both have two connectors. And does anyone know which color wires connect to the switch in a 77? Thanks you.

[focodave]

Blue and Pink.
See the following diagram, component 18/4:
https://www.globallistics.com/spiderswe ... mes/21.jpg

[Odoyle]

Thanks, still need to clearly identify if 18/4 (ignition thermo switch) is the larger or smaller switch underneath the manifold.