Beating Dead Horse - 9" Wheel 325/50/15 Back Space - Frame Notch

[getchasum]

I'm looking at a 9" wheel and need a little help......

First the car has a mild fender lip rolled and a frame notch to the center seam. The wheel I'm looking at is advertised as a '0' offset so I'm guessing that would be a 4.5 back spacing. I'm wanting to run a 325/50/15. I was a little worried that the bluge of the 325/50/15 may cause some concern on the 9" wheel..... Was wondering what you guys thoughts would be with the 9" wheel & tire combo above?

 

[getchasum]

Now I'm really confused....The chart I found says that a 9" wheel with zero offset is a 5" backspacing???

https://www.rsracing.com/tech-wheel.html#backspace

 

[forcefed3.8's]

5" should put the tire in the same position as a 15x10 with 5.5bs. The tire might be slighly narrower because of the wheel width.

 

[49-blues]

I'm using a 9" rim with 5.5" backspacing- it should require 1-1.5" notch on the frame.