Not all 4 core radiators are the same thickness, and how you mounted it may make a difference too. If you want good advice, you’re going to have to measure the distance you have from the nose of the water pump to the back of the radiator core. That measurement will determine if there are good electric or even mechanical fan options for you.
Just my opinion... Dont waste your time with an electric fan. Get a direct drive mechanical 7 blade with a "Propper" oem style shroud, propper sized pulleys, and propper HD / AC cooling waterpump.
The ‘95-00 Ford Contour electric fan set up I run on my Duster is far superior to the mechanical set up you’re suggesting. Better temperature control, less parasitic loss, more efficient all the way around. I can pretty much set any temperature I want to maintain and that’s the temp the car will run at.
Electric fans on classic cars fail because guys don’t pick fans that move enough cfm, they don’t use good thermostatic switches or controllers, and they overlook the power demands of a good fan that can pull enough air.
A direct drive mechanical fan is stealing power 100% of the time, whether you need cooling or not. And the chances of finding an “OEM style” fan shroud to fit behind an aftermarket 4 core radiator are real slim, pun intended. Not to mention, the factory AC cars that needed more cooling didn’t run HD water pumps. They ran the smaller 6 blade pumps with overdriven pulleys (1.3 or 1.4:1 depending on the engine). The HD 8 blade water pumps were on the non-AC cars with .95:1 pulley ratios.
