Since it's been 5 years, and you don't seem to be considering a rebuild (that's fine), I would recommend the following:

1) replace the pump (not that it's the problem, but you have it apart and small block oil pans are a pain to deal with in the car)
2) find a baffled SB oil pan
3) install a windage tray

Put it back together, don't run a fram filter, and experiment with heavier viscosity oil if need be. ALSO....running a half to a full quart over may also solve the issue, which is fine as long as the level is below the windage tray.