Does it look like a motorcraft carb from the 60s,I have one that I think is from a friends dads 57 fairlane that had a 312 and has ECZ cast in the side.  Was thinking about putting it on the 57 intake on the 292 I am getting for my 55 but might be able to be talked out of it if its the carb you need.

Butchering up everything I can get my hands on in Dayton Ohio

e-bay has 2 listings/ 250556722317 and 370325811181

Bud in Northern Arizona on route 66 in Winslow (standin' on the corner)

If you're American, buy American

631/2 Galaxie 500XL 406   55 T-Bird

I've got one but don't want to get rid of it yet, but e-bay has one current bid 280 bucks needs rebuilt with small parts missing. forgot to get the bid number. Enter "Holley carb list 1273" and it will come up for you. You can get the small parts off of any 4150-4160 readily available.  Good luck. 

Bud in Northern Arizona on route 66 in Winslow (standin' on the corner)

If you're American, buy American

631/2 Galaxie 500XL 406   55 T-Bird

This is the carb off of a 57 bird with 312 c.i. automatic. From the factory.