318 and 5.2's Same flywheel?

Are the older 318 (70's) and the later 5.2's have the same flywheel or will the older flywheel bolt up to a 5.2? What about 360's and later 5.9's?
The 318/5.2 is an Internally balanced motor, the 360/5.9 is an Externally balanced motor.