Two fans tend to work against each other if they are opposed like you say. You neeed a real shroud to get it to pull air thru the whole core... Either decide to push it, or pull it, not both. Also, the Neon fans may not work... If they are like the ones on my '97, they are meant to be run with a controller, and running 12 volts to them doesnt work... I tried...lol. I havent had working fans on that car in 7 years. The other thing you might want to play with are water restirctors vs a thermostat. Sometimes controling the collant speed through the radiator and engine will help it cool better by allowing more time for removal of heat from the block, and removal of heat from the coolant by the radiator.
the fans would be offset so they wouldn't be fighting each other... but yes will figure out a shroud
has a 160 T stat in it also
Another thing to think about is putting a minnie swith on the throttle that will turn the alternator off at WOT, saves about 2-3 hp and it'll run off the battery while you go down the track. To add save even more power, you can get an electric water pump drive, it's just a little electric motor that runs the water pump with a belt.
i like the alt kill idea...
They make temp probes that you stick in the fins of the radiator and you can wire it in after the switch on the dash. On the street, the fan comes on only when the radiator gets hot enough and you don't have to worry as long as the switch is on. Go to the track, flip the switch off, boom.
i have the fan already set up... all time switch, and temp sender...