I'm planning on updating my original radiator that I have on my '66 V8 289 Mustang.  It has the original 2 Row radiator.  I live in Southern California, and sometimes it gets really hot, but most of the time its nice and cool.  Would it be necessary to get an aluminum radiator or is a stock looking 4 row radiator sufficient?  

Another question also, I also want to change the original 5 blade fan and add a tempature controlled electric fan.  If I plan to add A/C in the future does this affect it, since some A/C kits come with a 6 blade fan?

Thanks.