When new, those control arms (or suspension arms) were smooth wall. The ball joint has quite shallow threads that displace the metal (rather than "cutting") when screwed in. Getting the joint screwing in straight is quite important (imagine). There are sockets available for just that purpose as...
I have used both (Monroe and KYB) on several of my Chrysler cars. I prefer the KYB. For me, the Monroe product is too soft. The KYB is definitely stiffer. Too stiff? It depends on the particular car that you are working with and personal preference. I have settled on KYB for use in my 1970...
Both usually needed socket sizes are available (as a set) on ebay at this time for 32.95 delivered. (Less cost than one socket from americanmuscle.) Powerbuilt 648749 Specialty Ball Joint Socket Kit (Kit 32). toolsmithdirect in Long Beach, CA.