<VV> 80 hp '61 engine question

[BobHelt at aol.com]

In a message dated 7/8/05 10:19:58 AM US Mountain Standard Time, 
donmanen at yahoo.com writes:

> I find a "pipe-type" plug screwed into the block
> below #1 cylinder-parallel to the lifter bore--- I
> have never seen this before--(but, I never work on
> 80's).  it's the same size as the oil sender
> threads-------1.  was this standard from GM?  2.  Is
> that in a pressurized oil passage? 
> 

Yes, That is where the oil press switch was located prior to 1962. 
Regards,
Bob Helt