(Going a different route sale)CNC ported 823's with multi-angle valve job, full stainless intake and exhaust valves, bronze guides and surface milled .006(70cc chambers).Intake ports flowed 360cfm at .700 valve lift. Rockers and springs not included. $899obo. For an additional $45, supply me with your springs and rockers and I will get your installed heights and rocker arms properly shimmed for consistent installed heights and proper valve sweep across the tip. Will not ship. Contact me at 239-888-6049. Local peeps only(Houston). Not wanting to ship.