Anyone know whether the radiator for a 4-cyl engine differs from that for a 6-cyl--and how so? I'm trying to get my red GT (moon roof, spoiler, rallye wheels, etc) running and the previous owner said it overheated after they put in a radiator that may've been too little. AutoZone says it's the same part for both engines. They quit driving it immediately. I've had it ('twas named "Hottie") for three years and am looking forward to driving him/her. Will replace the fan and temp sensor/switches. Any other suggestions? Someone just stole the cooling fan! Any "J-birds" got one for sale? Thanks.