I have a set of ATS spindles on my 79 malibu
https://lateral-g.net/forums/showthread.php4?t=12781 and they just bolt right in.. I bought global west arms as adjustable ones are very illegal over here.. but if i werent hampered by such stuff i would definately have gotten everything from marcus, especially with the new lower arm.. as i understand its the first lower arm to be changed geomerty wise from stock.. this keeps the wheel centered in the arch as caster is increased, neat product that i will have to have soon... (and marcus... where is my watts-link???
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but the ATS spindles are a no brainer.. the cheaper brakes OEM C5 almost pay for the spindles in reduced cost alone.. QA1's are a junk product in my humble oppinion... the settings drift, they change rates when they get hot, and no two shocks adjust alike, which is a problem sa ypu have them on both sides of the car.... bilsteins or even better Alston Chassisworks...