I'll have to check the spelling on the hydraulic motor. I intend to test the saw out before doing the rest of the build, I have already built the saw, just havent gotten around to mounting it on some sort of frame to do any testing.
I know what you mean about sizing the engine speed to the pump. One reason I am hesitant about going with the 471 detroit engine. It makes its hp at around 1800rpms, seems most of the pumps I am finding want to be spun faster.
Buying a new multi sectional pump is sort of out of the question right now, with that in mind, I am looking for used. Problem with looking for used is anything that has a sectional pump capable of pumping 30/40gpm is like looking for a needle in a haystack. Scrap yards around here have scraped out. If you do find any thing you can rob a sectional pump off of, you have to crawl in it, scrape off the grease, read the tag, and then research the numbers to see what size the pump actually is. Been there, done that, and am getting fustrated.