Intake Manifold without Pipe Threads for Vacuum port.

[Fred]

Originally Posted by Fullraceflathead

The manifold is smooth where it would normally be drilled and tapped. I don't see any extra material on it to support it being drilled.
This is why I bought it. I'm hoping it would be for a '28 or '29 as my '28 Roadster Pick up has the manual wiper blade as all of the commercial trucks came as I believe.

Does it have a large "HUMP" right at the top of the intake port ?.. If so, that is an early one.. If not it would be the regular one used from March 1928 until about mid 1929 ..