Hello, I have a 1975 440 Truck engine that is in my 1970 charger. On the back of the engine behind the carb is a slot that something plugs into. My thought is a ground but I was just wanting to know.

A. what plugs in there

and B. where does that lead to?

 

Is the hole threaded or smooth? Could be a vacuum port.

 

Dom -

If it's in the manifold and fairly large bore, it's probably a vacuum port. It can go to the break power booster or the PVC valve.

Like Tim said, is should be threaded and would take a 1/4" - 3/8" fitting for the vacuum tubing.

Archer

 

No its not a hole. It is like the end of a cord to a plug in Like it plugs into a slot.

 

Dom -

Can you post a picture?

If you can't try an Internet search for one that looks similar to yours and post the link.

Or you can just start the engine and see if there's a vacuum coming out of it.

Archer

 

If it is a chord ?. Maybe it is some type of engine heater ??

 

Its an electrical component not vaccum. It is like the back of a 2 prong plug with only one fork. That is the best I can explain


l l
l l

 

If its at the very back, and a round canister, then oil pressure sending unit with 1 elec. prong on it. If not, post a picture, its worth a thousand words. Lol