I have recently acquired a Land Rover Series 2 which has been retro fitted with an early Daihatsu engine which is great as I understand these early Daihatsu engines are bullet proof, however I need to identify what engine it is for the insurance.

I believe it may be a DG 2.5 from an F50, however all I really know is it is a naturally aspirated diesel and what the engine number is, as none of the documentation gives any indication of capacity or model etc.

Is there any easy way to identify the engine?

Thanks