Put a salvaged factory air in my 69 cuda. Used original everything including hoses. Changed the drier and expansion valve because it had been sitting open a long time. put pag oil in compressor. On my second summer now, no leaks. All the seal, hose, and Oring replacement talk is a bunch of hooey.
Buy a $20 leak detector at Amazon. Find any leaks and fix and you are good to go.
