LA heads on Magnum block?

IIRC, 1989-1992 blocks were the ones you want for a roller cam with LA oiling. I'm sure someone will correct me if I'm wrong. And I won't be butthurt.
I don't think you're wrong, but I've read that some of them went as far as into the 1994 models. But no guarantee that all of them in that year were. Suppose to have been a running change I guess.