O.K. here's the question with 2 parts ...
 

PART 1

I'm looking to put new wheels & tires on my car that will eat up the wheel well gap ... How can I figure out the sizes I need to accomplish this.
I'd also like to get a small rake look to it.

So how can I figure if it's going to take say 20's in the back and 18's or 19's in the front ... I know that this look is primarily done by lowering the car - but I don't want to touch the factory suspension. I know it won't be perfect or look exact without doing that - but again trying to come as close as possible and most importantly trying to eat up that wheel well gap without rubbing issues and what not.

The vehicle is a 67 Ford Mustang with stock factory suspension but did convert the front drum brakes to disc.

PART 2

If I do have to lower it - then can someone provide me with the info I need to do whatever or relpace whatever to the front & rear suspension to drop it down and eat up that wheel well gap that I'm looking to do.



Thanks for anyones help and assistance with this ...

As far as figuring out tire diameters I use the formula
aspect ratio*section width + rim diameter = tire diameter
1270

For example if my tires are 275/60 R15

60*275 +15= 27.99"
1270

from this you can play with different tire and rim sizes. This will tell you if you will lower or raise the stance by the wheels also