I am currently looking to put new wheels and tires on my 79 and wanting to know how big i can go in the rear to fit inside the wells. I am not sure if i want 17" or 18" but also lowering 2" .All the wheels i find online are not going wider than 8" due to the offset. Not sure what the means. I currently have 15x9 in the back now and it appears i can go another inch wider and still tuck. Any insight or advise would be much appreciated.