Problem brakes

[Mickythebricky]

Hi I am having a real issue bleeding the brakes on my 1999 Subaru Impreza it’s a uk turbo 2000 I have refurbed all the callipers, fit new rear brake lines, braided hoses all round and new master cylinder but I can’t get the air out of the front lines the rears seem fine no air bubbles but the front keeps pumping air out and the peddle with some resistance goes to the floor, my thinking is it’s pulling air in somewhere and that’s why I changes the master cylinder but still have the same issue. Anyone els had this problem, is there somewhere els it’s likely to be pulling air in.