I just bought a brand new Honda GX 270 8.5 HP motor for my splitter. I want to couple it to a 16 GPM 2 stage hydraulic pump,but need some help. I research pumps that are 16 gpm, the difference is the inlet and outlet sizes. The new motor has a 1" shaft. Should the hydraulic pump have a 1" shaft also? I noticed most of them have a 1/2" shaft. The ram I have is 4" wide with a 24" stroke. I think the shaft is 1.25 or 1.5". I dont know the operating pressure on the ram, but I am trying for very fast cycle times. The Speeco pump 16gpm at fleet farm has a 1/2" shaft and the Barnes Haldex from google has a 1" shaft at 16GPM. Which one is better and how much total fluid do I need to run this correctly?