For those of you running the 13" Cobra brakes, but with the original MN-12 Bird / Cougar 5 on 4.25" stud pattern, I've found something for you.
Rather than having to carry a full size wheel for a spare, or swapping a rear wheel to the front and putting your mini-spare on the rear, here's an alternative. The Lincoln LS from 2001 model year equipped with the 17" wheel option package comes with a 17" aluminum mini-spare wheel. These cars are also 5 on 4.25" pattern. I ordered one of those wheels in from Ford, and last night I tried sitting a Cobra rotor and caliper assembly in it. With a 1/8" spacer, everything clears. The only thing I didn't have on hand to try with it was the hub assy. I'm concerned that the hub hole in the wheel may not be large enough, it's 2.5" diameter. But there is lots of material that the hole could be opened up if necessary.
Not sure how many of those cars might be in the salvage yards yet, and the new one is a bit pricey, about $230 CAN wholesale price up here. No idea what the U.S. pricing is, I don't have access to that. The Ford p/n is 1W4Z 1007 BA if anybody wants to check. And if you're salvage yard searching, don't pass over black painted wheels thinking they're stamped steel ... these 17" minis are spun aluminum, painted black.
For a mini-spare tire to go on these, Ford's current supplier is Maxxis Tire, www.maxxis.com
. They have a T185-60R17 mini-spare tire for the LS and 03 T-Birds. Only about $75 up here, so maybe $50 U.S. ??