hey guys. my 85 blazer has original ac equipment, compresser and what not. the two lines that go to it i want to take off and take the other stuff out too, i will never have it recharged so i want it out. it sits right above the power steering pump, the lines arent squishy they feel like they have pressure on the m all the time. can i just take them off or do i need to take it in and have the system purged first?