Garth posted an excellent reply about pusher fans in your previous cooling system topic (radiator looks like it might blow) on January 2, 2018. Good reading.
https://pantera.infopop.cc/top...988#1598208419964988
Install 2 new pusher fans with new high volume blades as per Garth's post, install the Hall radiator sitting straight-up as designed. You can't buy a better radiator.