carb id for a '71 pickup

[71ih1210]

Hi, I have a 1971 1210 pickup with a 304 and a 4 speed manual floor shifter. It is 2wd. I have no idea what this carb is, but it needs rebuilt. Does not have any numbers in all the usual places. Does not say Holley or any other manufacturer anywhere. Starts and idles fine, but stumbles mid-circuit and higher without choke. I thought it was a 22xx or 23xx, but they just don't seem to match up. Here are a few pictures. Any help or info would be helpful. I'm beginning to think this was a non-oem carb. Thanks,
will

 

[71ih1210]

[url="http://www.flickr.com/photos/will1981/5146630833/"][url="http://www.flickr.com/photos/will1981/5146630427/"][url="http://www.flickr.com/photos/will1981/5147232504/"]http://www.flickr.com/photos/will1981/5146630559/[/url][/url][/url]p1010001 | flickr - photo sharing!

 

[Scoutboy74]

You're right. That carb is not original. It's a motorcraft 2100. Not uncommon to see them wind up on an IH. The oe carb would have been one of the Holley 2300 variants.

 

[71ih1210]

That's my huckleberry. Thanks. I would rather have a 2300, but I think I'm going to rebuild this. I found I really good site that goes through a rebuild at http://www.therangerstation.com/tech_library/pdf_documents/motorcraft_2150_carb.pdf