How much backspacing do you guys have if you have a 15"x10" wheels.

I think people recommend 5.5" with a 10" wheel.

I'm reasonably certain that the D's come in only one back space: 3.75" as I recall. Check their web site to be certain: www.americanracing.com (http://www.americanracing.com) For a look-alike check thast does have options check www.vintagewheelworks.com (http://www.vintagewheelworks.com)
rick