That makes sense. I had a hard time getting a gasket for my pump. Only way to get the right one is to buy a new pump. And i didnt need one. I was so afraid my pump would leak after rebuild but so far so good. The lifter wear is common for these engines. It makes a huge difference. The gasket i got wasnt perfect. The oil filter housing seal wasnt right and i used liquid gasket. Make sure to stick the lifters in oil and prime them before install. Also being soaked in oil makes em stick to the rockers and they wont fall out.