Was looking at water pumps on Partsamerica.com. Checked the price for a 65 Fury III 383 and came up with a part number of 58173 for $29.99

I then checked for the 78 Cordoba 400 I own and it came back with a part number of 58176 with a price of $21.99

Thought parts such as waterpumps for the Big Blocks were all the same?

Where the difference in these 2 parts(if any)?