I used a 74 K-10 with 4" lift kit from Russell for my 59 since it uses 74 axles that are equivlent to a 4" lift to fit the 59 springs. If I remember right the stock ones are 18" and the ones I got were 22" (braided SS, DOT certified). I called the help line to make sure the fitting would work, they arrived and bolted right in. I think they have kits in 2" length increments. I looked and the kit no is 695730 it has 3 hoses. They list it for 73 up, nothing for 72 but call them they probably have something that will work. Here is link to the site and page:
http://www.russellperformance.com/mc...es_truck.shtml