Needing 63 stepside longbed fender info

[rs74]

In 63 was there two different length longbed stepsides. I am thinking about buying my old K20 back but never measured the bed since it had utility boxes mounted where the fenders were. Which makes me wonder if there are two different length long beds then does that mean that the fenders and steps would be different too. If there is only one length long bed then no worries. I will just have to find a set of fenders and steps.