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Old 11-26-2019, 10:18 AM   #16
Desoto291Hemi
Senior Member
 
Join Date: Oct 2019
Location: Carthage , Tennessee
Posts: 199
Default Re: 8BA Low Oil Pressure

The What is it looks like a casting mark left over from the original molds.
I have seen these many times in other engine blocks.
I am new to Flatheads ,,,,I could be wrong,,,but that is what it looks like to me .

Tommy
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