Holley fuel pump question?

[1986Silverado]

The engine I am buying has a holley fuel pump on it. We drove the truck maybe, 4 miles. Looked under the hood and the pump seemed to have oil on the top of it. Anybody else running one of these ever have that problem? It did have gas in the oil that was on top. My bro-in-law says the gaskets between the body and top piece is leaking. I looked on Summit and did not see a gasket or rebuild kit for this pump. Here is a picture, not the actual pump, but same one. Thanks