the "B" body spindle and the "A" body spindle have different KPI angles, so the issue is if you do the "B" body swap then the upper control arm is a different length to make the swap work. so then to go back to a "A" body spindle you also need to change the upper contrlo arm, as well because the lower ball joint taper on the "B" spindle is different than the "A" you now need to change the lower arm. we have AFX spindles with both Ball joint tapers "A and B" but the KPI angle is the same on both.
we have recently built a UCA for the Second gen camaro to be able to use the AFX spindle with the original ball joints but you need to change the uppers and lowers to make it work. and you are in the same boat you need to use someones complete system.
i will confirm with Tyler what the combination for the B spindlees he was using and post it here.
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