Hey guys I need some help here, im replacing my thermostat housing on my 79 k10.
I did some searching and did not find what I was looking for.
It has the 350 in it and right now it has one of those chrome thermostat housings on it.
I got my original replacement and it has two holes on top of it. One is threaded and the other is not.
I have seen that the EFE sensor goes in the threaded one, how about the hole that is not threaded?
Thanks for any help.
Here is what it looks like:
