Unfortunately, I don't have a power steering idler arm off of a car to validate your description. I'm not going to trust memory either. Your idler arm bracket sounds proper for a power steering car.
Page 27 of Concours Parts & Accessories in Carson City, has some good pictures of idler arms and bushings for both manual & power steering.
Otherwise, all I can recommend, is to follow the instructions in the shop manual on pages 5-26, 5-27, and 5-28.
Keep us posted, Tom
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