Strange stock intake. Help ID

[Twilightoptics]

So I got this intake with another nikki carb from P71 a while ago.

I thought I'd dig it out and see if I could make something out of it.

It appears to have no provision for a shutter valve, and has 3 ports off the side the shutter valve would be on.

Would this be an upgrade from my stock '82 intake if I made a spacer to eliminate the port plate under my carb? Flow Characteristics?

I could run my manifold vacuum sources off the ports in this intake. I was thinking of welding the coolant passages shut to make it kind of a pseudo Racing Beat intake. I understand I need O-Rings if I do this?

Any ideas what this came off of?!