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. Vintage hydroplane plans. buy old plans from past publications. wally milosevich 280 cu in hydro – from the world of boat racing magazine april 1965.. 28 new and used hydroplane boats for sale at smartmarineguide.com made from the original plans, used wood hydroplane racing boat.