To lower or not to lower???
My 75 is lowered 1.5" in the front (done with torsion bar adjustments) and 2" in the rear (done with lowering block).
I don't have any problems with hitting bump stops.
When I was done with the lowering, I had the alignment done and they were able to get it all into spec.
Handles well (for a 3400 lb 4 door) and has a bit more 'Stance'
Also, have 15x8's front (225/60-R15) and rear (245/60-R15).
Take a look and see what you think.
Personal preference plays a lot here.
What do you want the car to look like?