Jason m....do you have a write up or parts list or something to work off of? I'm nulling over how to do my hydro assist on my tons as I continue the parts collecting and planning.
Norcal chris pretty much nailed it, I found a guy in my area that sold me his taps to use on steering box, so drilling and tapping was easy. Got all the fittings and hose's made at tractor supply, picked up a tractor supply 2x8 ram when I was getting the fittings.
I ended up drilling my pump port two sizes over stock size, The first time I drilled the hole it felt better but was still slow, so I pulled it apart and drilled it one more step over and that nailed it.
If you drill to big ( like my friend did ) it will work great but you blow lines off ( like my friend did ) LOL.
For the ram I used a 2x8, which for street use it might be a little slower than what your use to but can power the larger tires without the risk of bending the chrome rod.
Plus the other benefit of the larger ram is when you decide to go full hydro like me you can use the ram again.
As far as stroke that all depends on what hole you use on the high steer arms, 8" ram on the 8" hole from the KP center line will give you around 37-38* or steering which you get around 35-36* on a OEM axle.
Now this is why I always say remove the stops cause if you don't you will let the knuckle bottom on the OEM stops but the ram will still want to travel past it which can break knuckles over time.
The closer you move the steering point in towards the center of the KP the tighter you will turn, but now the U-joints can bottom out. You can like me grind the inner cups on your shafts to keep them touching or have the machined.
Coolers are simple, any major parts store will sell a auto trans cooler for ruffly 50-60 dollars, that's all that's needed. I have a friend who runs a condenser coil from a car A/C as his full hydro cooler. Pulled it from a junk car, flushed It out and installed it, works perfect.
Up until I went full hydro or rear steer it was one of the best mods I did to my rig. Yes return to center was lost as the ram holds or locks the tie rod in place, but dam bro it could force my nearly flat Iroks around like nothing in the rocks.