Hi,
  From what I have found, the 2655 was made only 3 years, '70, '71,
72 with a total of 1190 units made. This includes diesel, and Lp. The book I have does not break it down by engine type.... I suspect you will have a hard time finding that info.
  Engine displacement was 585 cubic inches in the diesel and 504 cubes in the Lp.....that being said, mine has the 504 diesel (I suspect it had been swapped out at some point in time).  Drawbar horsepower was listed at 120 horse for both engines....(as per the Minneapolis Moline Operators manual)
   Just curious, do you have dual tires on it....wish mine did.
               Hope this helps some.
                               Cal