TDubya
Sr. Member
Years ago when I upgraded to a 4 bbl carb, I also removed most of the emissions plumbing. One of the items that I did not remove was the cooling ported vacuum switch (PVS) in the thermostat housing. The vacuum lines were removed and capped, but it also had electrical connections going to it. I am not having any issues and understand what the purpose of the PVS was, but am curious about the electrical connections.