problems with freezer/frigerator

I put so much insulation in the old icebox that the  is not big enough for a holding plate (1 sq foot)  I have 5 sq ft in the refrigeration area. So now I am going to take the divider out, leave the floor of the freezer and put in a cold machine from Adler / Barbour  that will fit in the freezer area. I will have to put the top cutout back in place and seal it. and replace the formica again !!