front suspension upper arm in 65

Hi guys,

My front suspension has started to make this screatching noise. Interesting enough increasing after I drive for a while (and when the engine is warm, but I do not see the connection here). I have not been able to pump any grease in the the shaft nipples, Nipples seem to be stuck closed (is this a common problem?).
I realize that the arm installed is a cheap repro from china/japan. I am thinking of replacing the arms with better ones and made in US.
My question, are the more expensive arms indeed that much better or should I stick with the el cheapo 80dollar jobs. Or should I just replace the shaft?
Which brand is worth buying.
How do I prevent this issue in future.

Any experience that you can share with me would be highly appreciated.

R,

Jake