severe oil leak camshaft and crankshaft replaced still drips from back oil pan ?

What is your question?

Do you need to drain the oil to do the ftont seals and could the other seals from pressure the drip are after 4 miles I know a head is seeping but would it drip from the back of oil pan on bottom the spot is about the size of nickel or quarter when I park then it stops but it is cold