Have been told a few things, looking for live hydraulics on my 1949 m, started to research and source parts for pump that runs off Dist drive, was told by some the cam gear is pressed and not keyed, would spin the gear on shaft with extra load from pump, yet I see it done, also if I do this the suction side come from belly, to the aux pump and pressure goes to a spool valve, then to cylinder, remotes, wherever, do I still need the belly pump engauged, I wouldn't understand why, it is making 800 psi now, is this good spec, would also all this to look neat/tight, any pics or tips would be greatly appreciated, thanks dusty