I see that as well the brotch looks good the block had been dipped took 30. It does not match my z. As in my prior post I have a corvette 327 block already. I come across this block and having a real z car wanted to install this one. The person having it had 2 of them. It to me does not look like a restamp just heavier I can't see evidence of another number. That said even the seller was straight up not asking for a fortune. Thank you for responding maybe someone can add or bring more to light. Here a couple more pics
