D64 / A dual quad Edelbrock (and other intakes)

Bores are rough and barbaric with a mic reading that floats between 1.67 - 1.69. First post was correct.

How much plenum?

The shallow side runs from 1.89 at the front to 2.30 at the rear.
The deeper plenum side runs @ 3.30 front to 3.69 at the rear.

The port window size reported earlier is correct. Mic says, 2.00 high X 1.04 wide. A basic 2X1 window.