Mike, you are clearly a nutcase.
Todd, I wouldn't listen to anything he has to say.
Putting myself in Todd's position this is what I'd do.
1. Have a drink and a cry.
2. Pull myself together and get the wrenches out to remove the blower system.
3. Put the weight in the back and test fly it.
4. If the thing doesn't cool in flight, ditch the front rads and do a belly scoop or even a submerged rad setup aft of the batteries. This will help the C of G a bunch without increasing weight. The French DIESELIS airplane used this successfully.
"The coolant radiator is the same as found on the car, 650 x 265 mm size, 17 dcm2 area, quite a large piece to try and fit under the front cowling. We solved the problem by putting it behind the seats under the rear package shelf, which then permitted us to move back the CG, but which obligated us to install a "central heating" system in the plane. The total weight of the radiator, hoses, expansion reservoir and radiator fluid (7.5 liters) is 13 kg. The advantage in having the radiator in the rear is the available space to install a divergent/convergent ductwork for cooling efficiency and drag reduction. The intake is through a flush NACA inlet under the fuselage in a positive pressure area. The entry section measures 250 x 65 mm, that is 1.7 dcm2. The exit (like on the P-51 mustang) has a moveable flap to adjust the airflow and thus the coolant temperature. The adjustable flap makes a 10° difference. Because of the engine to radiator distance, the thermostat was removed to increase coolant circulation speed.
The water temperature is about 80° during climb, 70° in level flight, and 60° in descent. As on many auto engines, the oil is cooled in an exchanger, with the water circuit located at the base of the oil filter." There are some good photos of this in the new Contact! book Volume 3.
Moving the engine is such a big job with the tight fit there. I'd cringe to think how many other things you'd would have to move too.
Mike is not the only nut here. Aren't we full of good ideas to make your life easier?