Leaky fuel pump

I've had two different small blocks (360, 318 ) in different cars that both had (and have) this problem. I've tried two fuel pumps and gaskets in my current 318 trying to stop what appears to be oil leaking out from where pump bolts to block. I've looked along front of block for other spots that might be leaking but always come back to pump where it seams to bead up at bottom of pump. This causes a fine misting of oil and a mess every time I drive it. Wondering if any body else has had this problems with small blocks, and if so did they figure out a way to fix it? thanks