drop spindles

So, I should probably clarify and say the drop spindles aren't 100% unnecessary. I get a little carried away sometimes. ;)

If you want to lower the car more than you want to stiffen the torsion bars to compensate, you would need to use drop spindles to lower the car without constantly hitting the bump stops.

BUT, that has other problems. You do lower the car while maintaining the amount of available suspension travel with the drop spindles. That's assuming you lower the car a full 2", otherwise you're actually increasing the amount of available travel. But that travel is added everywhere. So, the suspension can travel an additional 2" up relative to the body. On my car, that would absolutely mean that my tires would hit the inner fenders if they used all of that travel. That would likely go for all of the 67-76 A-bodies, I know 72BBSwinger actually has scrubbed the tops his tires on lowest section of inner fender well on his car (without drop spindles). The only way to avoid that would be to run stiffer torsion bars and therefore reduce the amount of travel.

But, if you're going to run stiffer torsion bars, you might as well correlate the amount of drop with the amount of suspension travel you need. Sure, you might not be able to get as super low as you want without using stiffer bars than you'd like, but you might not be able to do that anyway. The amount of drop on my car isn't limited by the amount of suspension travel from the LCA to the frame, its limited by the amount of travel the tires have to the body, and that is a problem actually made worse by the drop spindles and softer bars. The only way around that would be to raise the "lowered" section of the inner fender up to where the tops of the fenders mount.

Another way to get around the suspension travel issue from the LCA to the frame is to use QA1's tubular LCA's. I had the CAP versions on my Challenger before the crappy CAP welds broke. The QA1's are much better pieces. Going to the tubular LCA allows almost 1" of additional travel because of their design, they have a much lower vertical profile. But, that STILL doesn't solve the problem of the tires hitting the body.