Is there a way to put power steering on a 1969 three-quarter ton high boy 4x4?

yes there is a way. You should be able to put the power steering system on from a standard 1969 3/4 ton, it should bolt right up to the existing linkage. Double check with a good four wheel drive shop. yes-buy a power steering gear box-2 power steering hoses & a resivoir & fluid.Ajunk yard (IF they know what there doing) should b able 2 tell U what years fit your applacation.OR go to & order U one-They only handle OLDER truck Pars.Thet come in handy 4 my 1971 K30.