Oil puddeling on intake manifold .Factory 273 4bbl duel exhaust

There is a heat riser passage that runs under the intake plenum to help with cold drivability. Exhaust runs in the passage to warm the intake fuel charge. That's where the burning paint comes from. As far as the oil, it is probably coming from a leaky valve cover gasket. Because of the heat in that area, the gaskets often dry out and crack in that area first.