Hydraulic clutch set up issue

I`ll throw my .02 in here, if the componets require 3/4 throw and your only getting 3/8, that`s half of what you need. your either lacking capacity, fluid, or air in system. If you can get 10 to .020 feeler between disc and flywheel through a whole revolution, then you got something else going on. All these systems should have a bleeder. good luck