I'm running a CS144 alternator from a late 90's chevy suburban with a 30% overdrive pulley to offset the 30% underdrive crankshaft pulley I'm using. (basically, it's running at stock speed, since the two cancel each other out). These alternators were used on conversion vans and tahoes or suburbans that had extra fancy packages, with lots of extra electronic stuff to draw on the alternator.
You don't have to run a fan controller, but I'd strongly recommend it unless you want to have the fan running all the time. On my Impala, the fans only ever kick on if i'm sitting at a stop for more than a minute. I'm also running a stock replacement aluminum radiator (courtesy of Autozone) on a 350 with aluminum heads. surprisingly enough, those cheap plastic tank aluminum radiators seem to do the job ok.