Is a 4 blade fan from a 330 motor ok to use on a mild build 350,also do i need a fan clutch,will be installing an aluminum radiator.2 or 3 row.Thanks.

 

With a 2 core with 1"+ cores, even without a shroud it should be fine unless your stuck in traffic with dessert temps. I never went above 195 in my 70S with a crudded up 2 core Copper/Brass rad, 4 blade and no shroud. Limited traffic and 30C temps at the hottest.