disc swap ?

[jocko]

truck rallies will work fine to clear disks. The wheels the catalogs are referring to are the stock pre-71 factory steelies. Those wheels have a slight taper on the inner face and it interferes with the calipers. Rallies fit over a mild disk brake swap - i.e. 11" (maybe even 12" rotor - someone might be able to chime in/confirm the 12" for certain). They won't fit over the 13+ big rotor disk kits, those are for 17-ish wheels and up. But if you do the normal off the shelf disk brake swap from cpp, pol, or ece, and don't get bigger than stock rotors, your rallies will fit no problem.