Both wedge and hemi now, I think the hemi was first but you can get wedges as well. 4.31" or 4.49" finish bore, they're $6k currently from a couple different suppliers. I don't think they have enough meat to go to 4.6" bore, and they don't offer a 4.9" bore space version, but at that point I don't think anyone would want a cast iron block anyway.