[Manowar]

Just to be on record here, our Man O'War Windsor iron block has a maximum bore recommendation of 4.200" and we regularly build our 460 version at 4.155" x 4.250". Our brand new aluminum block versions have a 4.155" max bore and can go to 460 cubic inches. They weigh 108lbs with billet splayed 4-bolt mains. We have 427 versions of each to 630HP.