So I'm looking for some help here. Once I'm finished with my resoration the last item to get is the wheel. Even though that is quite a ways down the road I like to keep the knowledge handy when the time comes. So here it is, I have the stock wheels and tire size right now which is a 15'' wheel with 4.25 backspace, 5 bolt pattern. Off the top of my head I think the tires are a 225/60/15. I want to go to a 17'' when its all said and done but maintian the overall tire dia and have a smaller sidewall so i dont have to change the speedo gears etc. What tire sizes do you recommend or is there a tool somewhere that you can plug in some numbers and it will tell you? BTW I would like to keep the same tire widths as I am going for a slight rake with 1'' eibach lowering front springs already installed.