How to removal of 1993 concord heater core?

You have to take the complete dash out, you must discharge the a/c its a big job, start on a Friday and you should be running by Sunday if you are an amature.I have a 94 concord with the same problem(leaks).....started to take it out twice.......but ended up using stopleak in the radiator........been working fine for 2yrs now