15" Wheels & Drop Spindles

[stexag]

I did this once before, but used 18" wheels and had no binding, I gather the smaller wheels complicate things.

I'm working on a 68 SWB and have swapped the front Xmember to an '84 for the 5x5 & disc brakes. I would like to use the McGaughty or comparable 2.5" drop spindles to bring the front down a little.

My question: At what wheel width can I anticipate rubbing and do the drop spindles antagonize the problem or help relieve it? If there is a certain brand spindle that is preferable I'll certainly consider them. Thanks in advance.