I can rig something up using a jack shaft. I can use the small pulley on the engine to drive a big pulley on one side of the jack shaft and have a small pulley on the other side driving a big pulley on the freezer . . . but that requires a lot of math to figure out exactly what size pulleys to use. A gear box would really simplify things.
But, I've looked at the price of new gear boxes . . . I really doubt that even with the Shaw discount it would make it cheap enough for me to justify buying a new gear box. I'm hoping to find a used one somewhere. If that doesn't pan out soon, I'll try Motion. I kind'a got a feeling I'll end up with two belts, 4 pulleys and a jack shaft.