What the heck tire CAN I run?

[TireSmoknWindsr]

stock fully rebuilt front suspension, 66 mustang. 15x7 wheel w/ 3.75 bs....what tire can I run that will somewhat fill up the fenderwell and fit with nooooooooooooo rubbing/clearance issues whatsoever? Looks like my 215-65s will get to be back tires on the '71 stang or somethin...i cant turn setting still w/o rubbing.

 

[mustangracer]

I run 225/60 15 on a 15x7 rim with 3 5/8" BS...and I'm lowered about 2" with coils and pro-m wedge kit.

I only had minor rubbing on bumps before I rolled my fender lips, so with stock suspension I wouldn't think it would rub at all.