Hey that's a good point Bob, although the really critical feature on the Spohn Panhard bar is the adjustability. The stock bar has no adjustment and will favor one side depending on ride height. I had a tire rub a few times before I modified my panhard bar with a tie rod link like so...
![](http://img.photobucket.com/albums/v440/Wademeister/Galaxie/IMG_2083_zps9ec03407.jpg)
I haven't had a tire rub since doing that mod even with the stock 50 year old (but still serviceable) rubber bushings.
Also on the 15x9 wheels and 5.5 backspace as I mentioned above, I did some shopping and found very very few 15X9 wheels. Oddly enough, the only one I saw with 5.5 backspacing was the Weld Racing Pro Star, which is a very close match to the wheels on my car! 15X8 with 5.00 backspace should be fine with a 275 tire and might be easier to find.
And now I see I've gone waaaay off on a tangent. Here I am talking about a 275/60-15 which is nearly 3" wider than the F70-15 linked from Summit. Yeah Galaxie352, those wheels and tires you linked should drop right in place with no problem.
As for the Lorenzen idea, he certainly used a bigger tire and went about it in a different way...
![](http://img.photobucket.com/albums/v440/Wademeister/Galaxie/Lorenzen_zps480ea974.jpg)