at what point are drop spindles pointless?

[jmedero]

I have a 68 burb and am getting my stuff together to bag it. My question is with bags, and either a cut down bag cup or a cupped LCA are drop spindles pointless? I dont think I want to remove my inner fenders or lay frame and rocker... just not that low on this project. So if I do the bag cup, or LCA mod are spindles pointless? Am I going to hit the ground with my lca first? Tell me what you guys think. I plan on running a 30 or 31 inch wheel and tire combo.
Also any pic that someone might have would be great.