[DeTomaso] 351C questions

[Tony DiGiovanna]

I've never figured its intent, but I am convinced grinding it away is a
significant improvement in exhaust port flow.  There is not a corresponding
form on the other side of the casting wall, so you can grind it away flush
with the port roof without any issue.

-----Original Message-----
Doug Braun
What's the casting "bump" needed for that's at the top-center of the roof,
1.5" in from the exhaust manifold surface of each exhaust port?