SSBC kit, what spindles?

For lower ball joints, use the ball joints that are for a 10" drum brake spindle for any 67-76 A-body. You will have to use big ball joint upper control arms, you cannot use the small ball joint units you have now...

Sure you can use those small ball uca´s, 72 and older spindles ARE for small bj... 73 and up I´m not sure