Show me one that can handle the power and be as compact as what is needed for a narrowed application while still retaining functionality. Being of European descent is irrelivant in this case as well, just like your attempts at a debate.

Yes, I know of heavy equipment vehicles that have independant suspension. No, that is not practical in a professional drag car. All of those guys use solid axles for a reason: they are simple, they have a minimum amount of breakable joints/parts and they are compact. If the object were to have the most complex and heavy rearend while having the huge slicks stick out of the bodywork like some 2nd gen camaro from Alabama, then the IRS would work out well. Until then, they will continue to use a proven formula in the wonderful world of professional drag racing.

And before you go on whining about more European dump trucks or whatever, do me and everyone else a favor and look up some pictures of Pro Stock, Pro Mod and Funny Cars, look at the rear track width and tire width. Your arguement will be null and void.