Just spacers, or spacer/adapters? With spacers, you're going to have to install some long lug studs to reach through an inch-inch-1/4 of spacer, the wheel, and still have enough thread to put a lug nut on. Spacers that thick are hard to find. You might have to buy several sets and double them up. ~~~~~~~~~~~~~~~~~~~~~~~~~~~ Spacers/Adapters bolt on to your existing studs, and have another set of studs to bolt the wheel on. You can find some spacers and a bunch of adapters on ebayMotors Just go to Car & truck parts. then, Wheels, Tires & Parts, then do a search for "Ford spacers", "Ford Adapters"....or "Mustang adapters" .
Thanks guys. The wheels I got are from an '07 v-6 Mustang. Bolt pattern's the same. Just need spacers & bolts or adapters. I found a bunch on ebay cheap. Thanks for pointing me there.
A spacer that wide is asking for trouble. You will be putting stress in places not designed to handle the stress. Personaly I wouldn't run a 1/4" spacer.