h23 and h22 oil pumps the same?
 

i looked on majestic honda and slhonda and it says that they are the same part number, but i called auto zone and they had an h22 but didn't have a part number for the h23. we got the h22 pump and at the very top in the center of the pump there is a 1/2" x 3" slit where the pump and block don't match up... any idea what to do?