If its still got the plastic tanks on the radiator, good luck finding them,so could be a new radiator ....
Be interested why someone added an electric fan, the stock clutch fan system are quite adequate to do the job and flow alot more air than most electric fans, so maybe there was a cooling issue that wasnt adressed correctly
Im running EF Ford twin thermos in my MK shorty project, not for effeciency but the huge body lift
IF you go that way and do a full thermo fan set up, its not hard and doesnt cost much
Fans $30, and coupla hours to do