Pusher vs Puller Electric Fan

A guy I know street/strips a Dart GTS with a built 440 (oooh boy if you could hear that think run!!) he runs a 2 pusher fans and the Flex on it just to be sure. And he has never had any problem with it. I have watched the car just sit there and idle for 30 mins in 90 degree heat and not boil over (mind you he runs the Be Cool Direct Fit dual 1" core Aluminum Radiator).