Fan pulley, removal nessesary?

Hi! First post. I'll do a short hello while at it.

Guy from Norway, been wanting a muscle car for ten years, just got me a 71 Dart Swinger with 340 and a 727 manual valve. Engine probably isnt from 71, as the car was dynoed in 2014 at 285hp at the wheels.

Well, back on track, the car was importes from Tennessee, which is a tiiny tad warmer than 70° north. With temps normally between 5-15 degrees in may-june the car isn't at much risk of overheating. As a matter of fact I havent seen the engine temp above 150°F. Even after 5 hours of highway speeds.

The fan is'nt clutched so it's perpetually cooling my engine. I'm thinking to just remove the blades, and leave the pulley for the alternator. Is this a problem in regards of balance in the pulley? I see the pulley is slightly off center, as the pulley seems to be conical, perhaps to balance the pull of the alternator and the weight of the fan.
I restricted air flow through the radiator (sounds better than cardboard in grill), and the engine of course heated up much quicker and idled nicer and generally drove nicer.

So, can I just remove the blades and install an electric fan?

Thermostat likely to be shot maybe? If there is one installed at all.

Thank you in advance.