which ball joints do i need

[66ChevC10]

Hey guys I got a 66 stepside and I just bought a set of mcgaughys drop spindles. when I bought them the salesman said that I should be able to use original parts when I do switch from drums to disc. He said get calipers/discs and pads for a 71 C10, my question is what ball joints do I need to get, 66' or 71' thanks for the help

[sixTsix]

try test fitting the old ball joints into the new spindles. Make sure they taper up into the spindles tight, but don't allow them to set because youll have to separate them again. IF it does taper in there with the stock, with enough thread set castle nut and looks like you can get carter pin in, then youll need stock. I didn't use mcgaughys drop spindles, so I cant tell ya from experience, but this is how I would approach it.
Hope this helps

[bama63]

63-72 used the same upper and lower ball joints hope this helps

[lolife99]

Originally Posted by bama63

63-72 used the same upper and lower ball joints hope this helps

This is incorrect.
63-70 or 71-72.
This can be verified by any parts store.

If you bought Mcgaughy's direct bolt on spindles for your 66 stepside,... you need 63-70 balljoints if your originals are wore out.

[lolife99]

63-70:
Upper: FA480
Lower: FA481

(71-72 uses FA683 upper and FA1014 lower)