Someone has probably removed the viscous fan if the is an electric fan fitted. That water pump is the correct one for a viscous fan assembly. Where is your electric fan fitted? In front or behind the radiator, there doesn’t seem to be a lot of room behind the radiator, which is the best option.
I've fitted one behind the radiator - as mentioned above a slight wangle of the fittings and I got a slimline one in. I'll try and find a link to the thread.
Here we go -
https://www.talkmorgan.com/ubbthreads.php/topics/604226/1I fitted a sucker, as I believe they are more effective than a blower (as they don't block the airflow getting into the radiator)