What's teh scoop with Spacers for rims???

Lars said
Here is a quote from the guy with the red Valiant that I posted pics of in the other thread.
wouldn't the 1" spacer put it further away from the cra??if so, y would 1/2" not rub and 1" rub?

and thanks a lot BTW..bc that's the exact set-up i'm curious about..i don't think the back will be a prob..bein i have a b-body rear which is about an inch long on each side anyways :-)