How to identify engine

[Swino]

Hi all just wondered if there is a way to identify what engine I have brought it was very cheap with it being unknown I know it's a v3v4 as it come with the inlet exhaust turbo everything even new cam belt and water pump so I took the gamble and it seems to have payed off fitted it in my v1 runs fine boost fine just idle abit lumpy and abit of tapping coming from heads been told it's normal if it's sti engine somthing to do with valves can hear it when driving only when bonnet is open and help would be great

 

 

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