Slimmer fans will give you clearance, but like I said in the other thread...
If you had poly uppers or flipped DB's...OR solid lowers like Cam suggested then that would limit movement. You can also modify the fan shrouds or beat the **** out of the header with a rubber mallet to shove it in the crossover more. We moved the AC lines in an '04 Imp SS to clearance the front header, and cut off some of the plastic shround with a dremel to make room. Doesn't have to be pretty but as long as it works, right?
Local here (deangtp) has a 2" aluminum rad + two 14" slimfans like you're planning on getting, and that damn thing keeps pretty friggen cool.
