Disk brake spindle and uca question

It is really what works for you. I used the 73 k-frame and suspension with the large rotors on my 72. With the 73-up style swab bar there is plenty of room. I just have my local NAPA make what ever hoses I need.
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Well not really, you can make anything ‘work’ but I’ve seen a lot of **** conversions with wrong hoses and suspect routing routing, and calipers installed with the bleeder screws at the bottom of the caliper with people wondering why they can’t bleed the brakes properly etc….

Yours is the CORRECT position and method for a 73 and up A body, this is what I’m recommending to the OP.

There are two correct methods one is the way you just did for 73 and up k members, the other, when rear mounted on either K member (67-72, or 73 +) is with the parts I have recommended.