Well first he doesnt have a marlin clutch
and second, my buddy had a marlin clutch and he had to modify his "stock hydraulic system" in order to run the clutch.
ok he doenst have a marlin clutch... issue is still the same, you do not need to modify the hydraulic system on a properly working vehicle..... now if said vehicle has been rolled 20 times and this issue is present, that is something else..... clutch replacements are jsut that, replace what was there, not require you to be an engineer to make it work