I have a new Dart Pro1 215cc Small Block Cylinder head for sale, this has a 72cc chamber for straight plugs. This head is not the newer Platinum series head. This head is a return from a customer because he didnt realize the chamber was 72cc's and he needed a 64cc. The customer polished the intake and exhaust runners but it was never bolted onto a block. Perfect if you blew one up and need a replacement head. This is a bare head and is cut for 2.05 intake & 1.6 exhaust.