383 knowledge anyone?

Andy F? Anyways... does that limit the horsepower on the heads... if so by how much and can I still put a stroker kit in it and leave the rest the same for now just to get started? Stroker kit plus the oil modifications and all new oil system parts. By the way... what kind of oil modifcations would need to be done to the block. I have a good idea but not really sure.