52 Special distributor

[mcdarrunt]

Replaced my points distributor with an HEI unit and noticed the factory distributor has a notch milled on each side that fits down into the block. Shows good oil pressure without the notches and rockers oil good so wondering why they were there. Previously ran an HEI for thousands of miles with no notches and no problems. Anyone know the reason for the notches?

Edited December 16, 2021 by mcdarrunt (see edit history)

[Ben Bruce aka First Born]

Birthday Brother, my thinking is that is the "oil path" for the cam/oil pump gears.  Notice they are not even, one being lower than the other.  Both have a hole drilled into the center.  The higher one, I believe, intersects the main oil galley.  Oil enters the hole, travels through to the shaft , then down to the lower hole , exiting to the gears. 

  Betcha if I am wrong someone will correct me!😁

 

  Ben

[Bloo]

Which HEI fits in a Buick Special Eight? Was it modified to make it fit?

 

[Ben Bruce aka First Born]

1 hour ago, Bloo said:

Which HEI fits in a Buick Special Eight? Was it modified to make it fit?

 

Yes.   He did one for me.  Oldsmobile, I believe.

 

  Ben

[mcdarrunt]

Ben is right, as usual. Looked again with my glasses on and spotted the oil holes. Better pop out and do a little milling and drilling.