Incendiarism

Hi there hoping someone could help me out here, I have a 4age engine (supposedly a rally engine) with a k50 gearbox. what sort of things do I need to get this running and what sort of starter motor, we were given a 4age starter but it doesn't fit. Also if anyone knows somewhere I could take this to get it all up and running to get it all certed that would be great as unfortunately I have no decent time to get it going myself