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If only things were that simple... The mounting bracket for the new unit is a part number W10440498 and the old unit uses a bracket which is part number DE70-00561A. Unfortunately it will not work for your new microwave, but everything else should fit the same other than the height difference as you mentioned. The new bracket will mount in a very slight different location as well height-wise, but it will look almost the same as the old bracket.
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