Do you any recommendations of which fan and clutch combo to use?

I see a bunch of fans available at places like Classic Industries but I don't know if I need a flex fan or OEM or a non-thermal clutch or the thermal clutch?

I have a new clutch but for the life of me I can't remember which I have? I had someone tell me that the fan should spin freely while cool but when the engine is warmed up and then turned off it should be locked up
until it cools. I tried that and my fan spun freely even though the temp of the coolant was at 230F. The engine seemed hotter than hell. The fan seems to pull air pretty well at idle so I am not sure if I have an issue with my clutch or not.

Thanks for the input.!