The electric cooling fan idea has been brought up numerous times and beaten to death on every bus bulletin board in existence over the years. Go over to the BNO board and do a search of the archives for "Two Dogs" and his saga of this idea for an example: www.busnut.com
The stock cooling system on your MCI draws about 40 hp to run those big squirrel cages, but I have no idea of the CFM.
For the amount of time and money you'd spend trying to convert to a different system, you'd be ahead financially to sell the MCI and pick up a Prevost or Eagle that already has the low-mounted radiator that's in place and properly engineered for the powertrain.
Then you could cut up the back end for your toys. . .
FWIW & HTH. . .