oil leak suggestions

[Benrs86]

ive had this oil leak for a while and finally drove me insane. its a smallblock 350. the leak is on the lower half (not valve covers or back of intake). today after school i pulled the engine out, and took the oil pan off. the rear rubber gasket was sealed good, but part of the cork one looked like it could have been leaking. do i just put new gaskets there or should i put a new rear main seal while its out? it was 3 years ago now that i rebuilt that motor and cant remember how that seal works. i would have to take all the caps off and lift the crank out a little or how would i do that? thanks, Ben