Some snags with my conversion

Solve the pedal-height first, and you will likely solve the freeplay issue.
At rest;
The clutch pedal pad should be about an inch higher than the Brake-pedal pad height when the brake pedal is properly engineered.

The brake pedal should park, way at the top, tight to the dash; I'll guess 7>8 or more inches off the floor. When you step on the brake-pedal, the first inch is throw away and does nothing but engage the booster if applicable, take up linkage play, and close the compensating port. Within the next inch, if everything is working right, and no booster is used, the pedal should get real hard. If your car has a booster, keep your foot on the brake and start the engine. The pedal should drop about an inch. But you should still have say, 4 to 5 inches to the floor. I'm guessing.
and that should nearly match where the clutch pedal would land with a mechanical linkage, after the freeplay is taken up.

However, I have no idea as to the various ratios of the hydro that you are using, so cannot speak to that system.