Hi Does anyone know of a cylinder head for spitfire 1147 that has part number 211289? I'm preparing a spitfire for historic racing and this part is mentioned in the FIA homologation form 165 as optional equipment to the Le Mans-style aluminum 8-port head. I'm very interested in finding out if that head is a cast iron 8 or 6-port head. See photo. Is it possible to see in that photo if it's an 8-port or 6-port?