Anybody have an opinion whether to use dropped spindles vs. lowering springs? Assume I get the same results, is there any good reason to go one way or the other? Obviously the springs are a bit cheaper but what about the ride or alignment issues? Thanks!
A dropped spindle preserves the car's steering geometry. It will handle the same with a dropped spindle as it did with a standard height spindle. The Only draw back is wider tires (Steam Roller wide tires not just bigger than stock size tires) will hit the spindle when it is dropped.
Lowering springs reduce ride height and you can go with huge by large tires and wheels without hitting the steering knuckle (it will hit everything else, such as frame and fenders but you kind of expect that). It also reduces the suspension travel so shocks don't work as they should and you will be bottoming out the suspension a lot more frequently.
I recommend a dropped spindle over lowering springs. If you want to go even lower then you go to lowering springs with a dropped spindle or air bags.