I need an Wheel/Tire education..quick

I'm running 14x6-4 inch back space-fronts 14x7-4.25 back space-rear ralleys on my 66 cuda [same as valiant] no modifications [spring relocation,mini tub ect.] I just installed 245/60/14 BFGs on the rear and 235/60/14 BFGs on the front [gonna change the fronts to 205/70/14s because I don't like the width and slight rubbing at full lock] now my car is lowered 3 inches rear and 2-2 1/2 front that's the only mod.