As Harry mentioned, Chrysler ball joints are common in the stock car circles (no pun intended).
Chrysler used two sizes of screw in joints. A large one for the bottom and a small one for the upper. Establishing which you have will help. Are they installed in both upper and lower arms?
I used a weld in sleeve for the small Chrysler joint in my lower arms. I then bought a Howe Racing XD housing and a stud for the bottom of a Nova spindle (the upper joint is a different size
). I used a standard Nova upper ball joint. Howe has a huge selection of ball joint bodies and studs, all available separately.
Once you have identified the size of your joints (large vs small) send an email to Howe Racing telling them what you have. They can tell you what parts you need to mount your S10 spindles. I found them to be very quick with a response.
While you are shopping buy the proper ball joint socket for installing them.
Ken
My other car is a Nova.