Keep in mind that '56 is shorter than 53-55. That is why it is the column of choice. Also look for one the the adjuster is not screwed all the way in, these boxes are spendy to rebuild. Finally, make sure it doesn't have "Gemmer II" cast into it, these are out of big trucks and are larger and have a longer pitman. I wish you'd have said something earlier, I've sold 5 of these in the last 6 months.