Here is the pump I ordered on ebay. I removed the old pump and it sure is bad.... the impeller just unbolts from the front of the water pump housing and I have the 5/8 fan stub, so the other threads and stuff on this site, I've found said this should be the 401/478 pump for me. You can also get this with a 3/4 in shaft as well.
http://www.ebay.com/itm/261726987664...%3AMEBIDX%3AIT
Thanks again! Terry