Im purchasing the QA1 upper and lower control arms for my 1964 plymouth valiant. Has any body done this ? If so what disc brake kit did you use ? And do they directly bolt on like QA1 claims ?
The upper and lower QA1 control arms use factory ball joints. You can get the UCA's in large or small ball joint, so which factory spindle you can use will depend on what part you bought. But those control arms use factory spindles, so in general any brakes that will fit a factory spindle will work with those control arms.