I don't mean to be picky, but to me the heads make the stage, not the block. If your using production style heads, you're Stage I. If you're using Stage II heads, you're Stage II.
If you're using a Stage II block with production style heads, you're Stage I. Unless someone has come up with new descriptions?
If you're using a Stage II block with production style heads, you're Stage I. Unless someone has come up with new descriptions?