Luke,
Here's a pic of a narrow frame rear lift on the back of a 72 I used to have. There is a pin that goes in the end of the lift where Brinly attachments or Cub attachments hook. There also is a U-Shaped bracket that bolts behind the triangle tow bracket. On the 1X6/1X7 series, you'll also need the bracket that holds the top cast piece. Used to have a pic of the bracket, but can't find it
. Someone else probably has a pic on the back of their 127 and will show ya one on the tractor.