A boat kit to build a wooden skiff style boat. row, some great comments and photos of his jon boat. came across your jon boat plans on the. Homemade jon boat built from uncle johns plans http://www.unclejohns.com/ took me approx six months to complete. 15′ 7" long, floor is 46" wide and sides. Flat bottom scow-type boat fishermen who like to work the shallow backwaters and weed patches on lakes and rivers will find this flat-bot-tom scow-type boat an ideal.