If you want to really start playing around with geometry and changes spindle heights have on roll centers, get some dedicated race spindles.
These are from a road race (thus symmetrical) ARCA car set against a stock Mopar spindle. Since many of these oval track units utilize the Mopar style ball joint, these are a good match for our ball joints. These spindles do utilize the same lower ball joint as the upper and have integrated steering arms, so you would need to use late B lower control arms. They also are from the era of 15" wheels, so they only utilize a 12.12" rotor. Adapting a larger 13" unit would require modification of the caliper mounting brackets, but that is no big deal for a good welder/machinist.
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