It's not the 73-74 Super Duty replacement, they are part numbers 17054910 and 17054911. They did make a few SR with part number 7044270 nearly as I can remember.
The 7044276 may have been for the standard 455 engines in 1973-74 if it showed up as a Service Replacement, but the Super Duty engines were completely different and took carbs with very generous idle fuel delivery, and they were the larger "800" cfm castings......Cliff