The E brake expands 1 shoe so it might take 1 pump to take up the wheel cyl space created but yes you'll be able to eliminate the rear shoe clearance & I dont think the clearance would/could be that excessive (low pedal reserve yes but not to the floor). Either; air/bad booster/excessive round nub clearance/bad M/C/excessive shoe/pad clearances. I forgot what's been done/checked. On a difficult case I cap the M/C & want a hard pedal with virtually no travel (idling) if the booster/MC is bled out & functioning normal then hookup 1 half & continue on. Holler how it goes David