My 76 cordoba is 6 and 1/4 inches above the ground at the frame. The tires right now are 215/75/R15, will I risk hitting the frame or the oil pan if I get 14's with tires that are 175/75? I need to know cuz my brother wont stop bitchen about how it is too small, and the ride is goona be too rough ( personally I could care less if the ride is rough. I just wanna look good). Please help me.