champion for the alum radiator. Mine cools well with no leaks & only had to redrill 1 mounting hole on one side flange. A guy on here sells em. Most people seem to be happy with em & once in awhile a report of a twisted one so check for that ASAP if you get one & the occaisional mounting hole needing redrilled like I had to do but no big deal & I'm happy. For a perf app I think I'd get a 3 or 4 row core right off the bat. There was a thread on what to do to add a shroud but I missed it