What was/were the original actual sentences of these two girls? We're told it's not life without parole, but what was it?

Parole is not, at least in most states, a matter of right; it's a judgment to be made by those properly appointed to do that, based on standards adopted by the particular state.

I don't know what California sets as the standards by which the parole commission makes their judgment.

Although California's standards may provide for the possibility of some reduction, either for good behavior or judgment of not being a present threat, my present personal thought is that they should serve the original sentence(s) in full. I don't consider this revenge, nor particularly retributive. The original sentence(s) was/were imposed as being what justice warranted, and should apply, unmodified by second and third thoughts forty years later.

Dave Oesterreich