69 Dart Custom Slant Six carb help needed!

The 6260 was a service replacement carburetor offered by Holley for '68-'72 198 and 225 engines. That number is carb's only ID number; there was no metal tag with additional numbers or info (Carter carbs had their ID number on such a tag).

Carburetor operation and repair manuals and links to training movies and carb repair/modification threads are posted here for free download.
Thanks...much appreciated!!! But I guess that means its not the original carb then(??) If not, how would I ascertain what the correct number carb would be?? Could it have been any one of a few #s, in which case the date code would be more important??