Got an 83 Ram Charger with a 440 today!

I think I'd ditch that flex fan and add a shroud to the radiator. Those flex fans are a grenade just waiting for the pin to fall out! You could also use the correct return springs on the carb and kickdown linkage along with the right washer and clip for the pin. A pretty gnarly looking kickdown link but if it's adjusted correctly, I guess it will work.