[Mercmarc]

Hello gosfast,

Regarding the lifters in the second engine, below is the most accurate information I could find.

I looked up the Reds Heads Lincoln Zepher style adjustable lifters that I understood were installed in the second engine. Looking closely at the pictures of said lifters, they appear to be ground flat across the adjusting nut area where the valve stem makes contact.

The first engine's non adjustable lifters are very clear domed or crowned.

Thanks again for everyones input and help. Still waiting to hear from the builder.

Respectfully

Marc