Yes, what you have is casting that doesn't match the original. The eBay water pump is listed as a 68 and 69 because of the casting number. Frank can sell it at a premium by listing it that way. Here is the same pump listed with your car included. I didn't show you it to start with because the problem area wasn't shown.
http://www.ebay.com/itm/NOS-MOPAR-1...Parts_Accessories&hash=item35cb731a9a&vxp=mtr
