"A" Carburetor Question: Bore size and center to center mounting bolt length?

[rusty12]

This is a related but non-related question:

Visiting a friend with a 1912 Buick that needs a carburetor to get it running. It looks like the intake manifold will accept a Model A carburetor. He isn't a Model A guy and I am not near my Model As and parts.

I need to know the bore size as well as the mounting bolt center to center measurement for a stock Model A carburetor.

Thanks in advance!