So
A. you have 10 amps all the time in the above example..
B. The 10 amps are there as long as you have the a/c on regardless if the engine is cold enough say driving at a highway...
C. Yoy have the motor radiator "blocking" the flow, also the "side casualties" <img src="/forums/images/graemlins/lol.gif" alt="" /> <img src="/forums/images/graemlins/lol.gif" alt="" /> <img src="/forums/images/graemlins/lol.gif" alt="" /> <img src="/forums/images/graemlins/lol.gif" alt="" /> since there is free area to suck air between the two radiators instead "forsing" the air to come from the front cooling the a/c radiator...

(As I said.. I like your idea of removing the a/c fan so much and I want to make it "bullet proof")