three suspension questions

I found this.......

http://www.forabodiesonly.com/mopar/showthread.php?t=221285

and

https://www.wellerracing.com/Sweet-Mfg-Steering-U-Joint-34-Smooth-TO-34-36-Spline_p_2111.html

Some cheaper yet

http://www.bryke.com/steering_accessories.html