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Hello, nice how you have over come the 12 issue. From what I have read, the 11 blade and it outter ring is bias to the 1&2 cylinder. Since you ommited the otter ring, you might have an even greater over shock of 1&2 cooling. I believe Wally did some work on the 11 blade and 12 blade. I don't know the in's and out's but try and ask him.
Lastly, I see your pullies, you may be loosing allot of why you are using the 12 blade setup, using the larger OD Alt pulley. Will the car be in cold climate? That fan needs to turn, even more at idle after coming to a stop in traffic and you engine has been working hard.
Just my 2 cents.