Originally Posted by halfton
i have a 1965 chevelle i want to put disc brakes on the front can i use the brakes from a 78 to 84 malibu and what else would need to be changed
GM changed the taper on the ball joint stud after 1972. The later spindles will physically bolt up but the tapered ball joints (and tie rod ends) will NOT be supported properly. You would need to change to the later ball joints and tie rod ends. The upper ball joints bolt in, but the lowers require machining to fit in the control arms. The tie rod ends require special sleeves to mate to the existing inners. Finally, the later spindles are taller, which can cause problems with alignment unless you use shorter aftermarket upper arms. By the time you do all of this, you might as well go with the B-body spindles and get 12" disks as well.
On the other hand, Speedway Motors has a factory-style A-body disk brake kit that's probably the least expensive one I've seen.