Butchered W2 Strip Dominator Intake
That's an easy fix. Fill in the roof with epoxy and make it back to round and clean up the plenum with a couple of hours of grinding.
Squaring off the top was an early 1980's trick. Not sure it worked as I didn't bother testing it. If the top needed to be square, I made the port square.
That's an easily repaired manifold.