Bought a 64 chrysler 300 2dr to fix back up. 383/auto. Got her up and running with very little work. But the Carter AFB carb needed a kit because pump had dried out. Ran this number on it and I'm finding conflicting results what it originally came off of. One dude on Ebay has one $1500 saying it off Hemi car? I know it's not the original because carb to throttle linkage rod is homemade piece..
Part number on carb is 4137s

What did it come on originally?

Any help much appreciated.....

Thanks Moparts!!