Purchase online, then download start building today! the dillon laker 14: boat plans: a recreational tunnel boat for motors 60 hp to 80 hp. Hull type: tunnel hull with full length sponsons developed for sheet plywood planking. power: long shaft outboard motor to 140 hp. can the hull be extended or. Home made hydroplane race boat . designed in 1954. motor is a 1954 mercury mark 20h outboard. this home built boat was built using clarkcraft plans. the.