Make a 2x6 base that the cabinets would sit on and attached too. Or any other 2x that well get you too the height you want Im sure I do not not need too tell you how too trim it. You can also do what I did for the top. I used 2x12 and 2x6 glued together and bolted together, than I screwed two sheets of MDF. The MDF that takes two men and a boy too pickup. On top of that I glued Formica on top and sides. I used butcher-block style. At one time I used white but the light shining on it would almost blind me. That well get you about 3” more.
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