Starter bracket bolt size...

[Mtl-Diesel]

Can anyone confirm what size bolt is used to secure the starter support bracket to the block? I am fabricating my own but bolt holes in block are empty. Engine is a 1984 Mercruiser 140. S/n: 6777639

Thanks guys!
Rod

 

[Alumarine]

3/8"-16 course

 

[Mtl-Diesel]

3/8"-16 course

Thank you!!!