Hydro Coversion ????

[Ddog87]

Ok, I have been reading alot about the hydro conversions http://pirate4x4.com/forum/showthread.php?t=185940&highlight=hydro
and now my brain hurts :shaking:
This is my question. I am looking at using this pump I got from my father in law
http://i221.photobucket.com/albums/dd16/Ddog87_2007/pumpforbender001.jpg
http://i221.photobucket.com/albums/dd16/Ddog87_2007/pumpforbender002.jpg
It is rated at

F98 SERIES
2.6 cipr (42.6 cc/rev.); maximum pressure 5000 psig (345 bar); maximum speed 1300 rpm; bi-rotational; typical performance 10 gpm (37.9 lpm) @ 1000 rpm and rated pressure.

And this ram. SPECIFICATIONS

* Double Acting
* Bore/Stroke 2" X 24"
* 2500 PSI max
* Rod dia 1.125"http://surpluscenter.com/item.asp?UID=2007111213235802&item=9-4300-24&catname=hydraulic
And either this electric motor http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=96403
or this gas motor http://surpluscenter.com/item.asp?UID=2007111213125163&item=28-1594&catname=engines
The guy's at Williams machine told me if I run it @ 3.6 GPM I would need a 5HP motor. Is this too much GPM?? Should I step down to say 1-2 GPM ??