It's narrower than the Otter 140 and E140 but not that narrow, similar to Aire 143R or many others. Look to the many other 14' rigs for the bay layout (4 bay likely). You will just need slightly narrower boxes than the otter and E140. You can use a 60" or 66" frame and 9-10 ft oars.
Nothing magical about the 142, but it is a great boat. I see the Otter 140 and E140 as wide rather than the 142 as narrow. What is 6" between friends