Best way to cool it?

First thing is to get a mechanical temp guage and probe and make sure she is running hot with a 180deg thermostat, hot would be anything above 195-200. Then for the price I'd go find a shroud before spending the money on an aluminum rad and fans. Is your rad a 2 core or 3 and what kind of fan you running, 6 or 7 blade steel or one of those POS plastic jobs.

+1, get a mechanical gauge and check your actual temperature first. Who knows, your dash gauge just might be wacked and you may not need a thing. (?)