I had no idea what to call it, I had to google it to check. The term China wall gets used be the small block guys often, as there is an oil feed in the front China wall.

The new Callies block show the height for the China Wall in their advertising, that is where the 10.875" dimension came from, FYI

I am considering doing a run of B1 billet valley plates this year, and am just verifying some dimensions. I am planning on changing my previous design.

Thanks for the replies


Alan Jones