That's a pretty big jump in size, you're probably not going to be able to avoid having to use adapters. Even the stock lines used adapters, from pipe thread to inverted flare, in the block end. You might check with either Napa or perhaps a farm store like Tractor Supply that makes hydraulic hoses, see if they can make a custom hose for you, but most likely, you're going to end up with some adapters in the system. The stock hosed were 1/4", and you'll need to have a 1/16" restrictor somewhere in the system to keep the pressure and flow rate correct.