There is no telling what some previous owners did to the engine over the years. Someone may have put it there because the last engine they rebuilt had one???
I'd do it like the repair manual says do it for your year engine.


1937 Chevy Pickup
In the Gallery
1952 Chevy Panel
In the Gallery
More photos
1950 Chevy Coupe
Pictures!

I'd rather walk and carry a Chevy hub cap than ride in a Ferd.
I can explain it to you, but I can't understand it for you smile