how low on rallys?

[warriorsimi]

here's my 72 with rallies my question is how low can I go with out it hitting the rim on the inside? it rubs right now ,I trimmed the lower control arm already it helped a bit but not much.i ordered two inch drop springs and it made it worse I have 3 inch drop spindles with the 15" rallies is the only answer is to get bigger rims? this pic is before installing the drop springs.