Generally speaking, NOS parts from that era are going to outlast the chinese junk in the market now. Yes, there were production failures as always but NOS stuff in general is much better. My last issue with aftermarket was a headlight switch. Almost caught my car on fire. I sprang for a NOS one and not only has it lasted years but the dimmer is so smooth versus aftermarket one that was like grinding pebbles. Before that was 11" brake drums from Raybestos that were only $25 each but absolutely unusable and I wasn't going to spend the money on shipping to return to Rockauto. I sprung for NOS and five years later all is well.