The radiator is mounted 18" ahead of the engine and lower with a shrouded stock electric fan from an 85 z28... I have a 32lb cap on the radiator and a 16lb cap on the t-stat housing fill.......I also have an unshrouded GM 7-blade fan mounted to the water pump with a locked fan clutch to help move air through the box.... Both fans are in the correct orientation to move air rearward...
The water pump is also the correct unit for serpentine...
I fully agree with you regarding belt driven fans moving more air.....The factory seven blade fans have the power to blow the hood off if you lock the fan clutch....
I was not aware that pulling against the brakes was any harder on the trans than driving.... thanks for the warning!