It's going to be a 383 stroker. It is a new block as far as I know. Should be fun. I'm hoping to make around 400-425 at the crank with it.
I'm going to put it in my '97 Chevy. It will retain the Vortec EFI system so I can't get too crazy. I'm going to replace the stock poppet valve injector spider with the replacement EFI spider that GM offers. I may eventually tackle the marine manifold upgrade, but not right now.