The 1953 Super M manual refers to both systems as Liftall. One is the transmission-driven Liftall (i.e. belly pump) and the other is the distributor-driven Liftall (i.e. live hydraulics).
We just call them "belly pump" and "live hydraulics" around here... No need to get so technical...
But yeah, in a nutshell, the stock live system worked exactly the same as the original belly pump: One-way hydraulics.
The main difference is you don't lose pressure when you push the clutch pedal. Adding two-way hydraulics is basically the same as on the belly pump... You need an open-center valve bank, with the OUT plumbed to one of the plugs in the rear of the block, and the IN plumbed to one of the pressure outlets in the casting that protrudes from the rear of the block.
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