What is going on here?

[EH179]

https://photos.google.com/share/AF1QipP ... ptbjVqRHdn

Noticed this hole in the power valve well and don't believe it should be there.
It is a 750 HP main body on a N/A engine, so boost reference is not needed.

I do not recall if it was there from new and if it wasn't...what caused it?

[Woodruff]

There has to be a hole leading to manifold vacuum. Is that the only hole in the well?

[EH179]

As photos show, it would appear so.

[GTO Geoff]

EH,
I looked again at the pic & it just didn't look right. In my H book, the man vac access to the PV comes up through the bottom of that chamber.
That hole looks like a casting flaw, & it may go through to the throttle bore.
Carb also looks like an older model, doesn't have the acc pump brass transfer tube.
Cheers.

[Right hand drive]

Must be normal. Found this. Holley HP main body doing 360* view on Summit.

[jmarkaudio]

Vacuum port leading to manifold vacuum to control the power valve. That's normal.

[EH179]

Bloody big hole for a vacuum port, but it is what it is. Thanks for the confirmation guys.